Wat is Wetenskap Werklik?
Inleiding: “Die Wetenskap Sê…”
Daar is min frases in ons kultuur wat soveel gesag dra as hierdie drie woorde: “Die wetenskap sê.” Dit is die troefkaart in byna elke gesprek, oor gesondheid, oor politiek, oor die oorsprong van die heelal, oor of God bestaan. Iemand hoef net te sê “die wetenskap sê” en die debat is verby. Wie gaan teen die wetenskap stry?
Maar hier is die ironie: die meeste mense wat hierdie frase gebruik, het nooit regtig nagedink oor wat wetenskap is en wat dit nie is nie. Hulle gebruik “wetenskap” soos ‘n talisman, ‘n magiese woord wat outomaties alle vrae beantwoord en alle twyfel verwyder. In werklikheid is die wetenskap ‘n pragtige maar beperkte instrument. Om dit reg te gebruik, moet jy eers verstaan wat dit kan doen en wat buite sy bereik val.
Dink daaraan: as jy iemand vra “Wat is wetenskap?”, sal die meeste mense iets sê soos “dit is wanneer wetenskaplikes navorsing doen” of “dit is wat in laboratoriums gebeur.” Maar dit is soos om te sê musiek is “wanneer mense instrumente bespeel.” Tegnies waar, maar dit mis die dieper punt heeltemal.
Wat is wetenskap werklik? Sy metode, sy geskiedenis, sy krag en sy grense. Nie om wetenskap af te breek nie. Inteendeel. Om wetenskap te respekteer vir wat dit regtig is, eerder as om dit te vergoddelik tot iets wat dit nooit bedoel was om te wees nie. Want wanneer ons wetenskap oordryf tot ‘n alwetende gesag, doen ons nie wetenskap nie. Ons doen filosofie. En gewoonlik slegte filosofie.
Hierdie reeks, Wetenskap & Werklikheid, bou voort op Reeks 1, waar ons die metafisiese fondament gelê het: God as die oneindige Grond van alle syn, die Logos agter die werklikheid. Nou vra ons: hoe staan die wetenskap in verhouding tot daardie fondament? Het die wetenskap God oorbodig gemaak, of ontdek dit juis die orde en skoonheid wat die Skepper in sy skepping geweef het?
1. Die Wetenskaplike Metode: Wat Wetenskap Eintlik Doen
Wetenskap is, in sy kern, ‘n metode. ‘n Gedissiplineerde manier om kennis oor die natuurlike wêreld te bekom. Nie ‘n liggaam van ewige waarhede wat op kliptablette gegraveer is nie, maar ‘n proses van vra en antwoord, van toets en hersien. Daardie proses het ‘n spesifieke struktuur:
Waarneming. Alles begin met die opmerksame oog. ‘n Wetenskaplike sien iets in die natuur wat sy aandag vang. Appels val na die grond, nie opwaarts nie. Sekere plante groei beter in die skadu. Lig buig wanneer dit deur water gaan. Die wetenskap begin met empiriese waarneming: die noukeurige, stelselmatige bestudering van wat ons kan sien, meet en weeg in die fisiese wêreld.
Hipotese. Op grond van waarneming vorm die wetenskaplike ‘n verklaring, ‘n hipotese. Dalk val appels omdat daar ‘n krag is wat voorwerpe na die aarde toe trek. Dalk groei daardie plante beter in die skadu omdat hulle minder lig nodig het vir fotosintese. Die hipotese is ‘n voorlopige antwoord wat nog getoets moet word.
Toetsing. Hier kom die eksperiment in. Die wetenskaplike ontwerp ‘n manier om sy hipotese te toets, om te kyk of die voorspelling klop. As die hipotese waar is, dan behoort X te gebeur onder omstandighede Y. Die toets moet herhaalbaar wees: ander wetenskaplikes moet dit kan oormaak en dieselfde resultate kry. Dit is een van die groot sterkpunte van die wetenskaplike metode. Dit is nie afhanklik van een persoon se woord nie. Dit is ‘n gemeenskaplike onderneming.
Verwerping of Bevestiging. As die eksperiment die hipotese weerspreek, word dit verwerp of aangepas. As dit die hipotese ondersteun, word dit sterker, maar nooit absoluut bewys nie. Die wetenskap werk deur voorlopige bevestiging, nie deur finale bewyse nie. Selfs die sterkste teorie bly oop vir hersiening as nuwe gegewens dit teenspreek. Newton se gravitasiewette het vir meer as twee eeue onaantasbaar gelyk, totdat Einstein aangetoon het dat hulle ‘n spesiale geval van ‘n dieper werklikheid is.
Eweredskapsbeoordeling (peer review). Wetenskaplike resultate word aan die breër gemeenskap voorgelê vir beoordeling. Ander kundiges probeer foute vind, alternatiewe verklarings gee, die werk herhaal. Hierdie proses is nie volmaak nie. Dit word beïnvloed deur sosiale druk, finansiering, modes en persoonlikhede. Maar dit is ‘n noodsaaklike meganisme van selfkorreksie.
Die skoonheid van die wetenskaplike metode lê in sy kombinasie van vrymoedigheid en nederigheid. Vrymoedigheid, want die wetenskaplike waag om te sê: “Ek dink ek weet hoe dit werk.” Nederigheid, want hy voeg altyd by: “Maar ek mag verkeerd wees, en ek nooi jou uit om my te toets.”
Hierdie metode het vrugte gedra wat ons lewens verander het. Ons verstaan die struktuur van atome, die werkinge van die immuunstelsel, die ouderdom van sterre. Die wetenskaplike metode het gelei tot medisyne wat miljoene lewens red, tegnologie wat die menslike ervaring omskep het, en ‘n dieper waardering vir die kompleksiteit en skoonheid van die natuur.
Niemand hoef teen die wetenskap te wees nie. Die vraag is nie of wetenskap waarde het nie. Dit het geweldige waarde. Die vraag is of wetenskap die enigste manier is om waarheid te bekom.
Maar merk op: die wetenskaplike metode is ontwerp om die natuurlike, fisiese, meetbare wêreld te bestudeer. Dit werk met dit wat empiries toeganklik is: materie, energie, ruimte, tyd. Dit meet wat herhalend is, toets wat eksperimenteerbaar is, en waarneem wat deur die sintuie of instrumente waarneembaar is.
Dit beteken dat die wetenskaplike metode, deur sy eie aard, nie toegerus is om vrae te beantwoord wat buite die empiriese domein val nie. Dit kan nie uitspraak maak oor God, oor moraliteit, oor die betekenis van die lewe, oor liefde as meer as chemiese reaksies, oor die aard van bewussyn, of oor waarom daar hoegenaamd iets is eerder as niks.
Dit is nie ‘n mislukking van die wetenskap nie. Dit is ‘n eienskap daarvan, soos die feit dat ‘n teleskoop nie musiek kan hoor nie ‘n mislukking van die teleskoop is nie. Dit is eenvoudig nie waarvoor dit ontwerp is nie. Die wetenskap se krag is ook sy beperking: dit fokus op die meetbare, en daardeur mis dit noodwendig alles wat nie meetbaar is nie.
Peter Medawar, die Nobelpryswenner vir geneeskunde, het dit duidelik gestel in sy boek The Limits of Science (1984):
“The existence of a limit to science is, however, made clear by its inability to answer childlike elementary questions having to do with first and last things — questions such as ‘How did everything begin?’ ‘What are we all here for?’ ‘What is the point of living?’”
Medawar was nie ‘n teoloog nie. Hy was een van die twintigste eeu se voorste wetenskaplikes. Maar hy het verstaan dat die wetenskap se krag presies lê in sy beperktheid. Deur te erken wat dit nie kan doen nie, beskerm ons ook wat dit wel kan doen.
2. Die Filosofie van die Wetenskap: Hoe Wetenskaplikes Werklik Dink
Die meeste mense dink wetenskap is ‘n eenvoudige, reguitlyn proses: jy doen ‘n eksperiment, kry ‘n antwoord, en gaan aan. Maar die geskiedenis en filosofie van die wetenskap wys ‘n meer komplekse prentjie. In die twintigste eeu het ‘n reeks denkers navorsing gedoen oor hoe wetenskap werklik funksioneer, en hulle bevindinge is verrassend.
Karl Popper: Falsifieerbaarheid en die Grense van Bewys
Die Oostenrykse-Britse filosoof Karl Popper (1902–1994) word dikwels beskou as die belangrikste wetenskapsfilosoof van die twintigste eeu. Sy kerninsig was eenvoudig: wetenskap vorder nie deur dinge te bewys nie, maar deur dinge te weerlê.
Popper het dit die falsifiseerbeginsel genoem. ‘n Stelling is wetenskaplik as dit in beginsel weerlegbaar is, as daar ‘n moontlike waarneming is wat dit sou kon bewys as verkeerd. As iemand sê “alle swane is wit,” is dit wetenskaplik, want jy kan in beginsel ‘n swart swaan vind. (En inderdaad, toe Europese ontdekkingsreisigers in Australië swart swane gevind het, is die stelling weerlê.) Maar as iemand sê “daar is onsigbare elfies in my tuin wat hulself onttrek aan enige moontlike waarneming,” dan is dit nie wetenskaplik nie. Nie omdat dit noodwendig onwaar is nie, maar omdat geen moontlike waarneming dit sou kon weerlê nie.
Popper het hierdie beginsel ontwikkel deels as reaksie op twee invloedryke denkrigtings van sy tyd: Marxisme en Freudianisme. Hy het opgelet dat aanhangers van hierdie stelsels enige moontlike waarneming kon verklaar binne hul raamwerk. As ‘n Marxistiese voorspelling nie uitkom nie, word die teorie nie aangepas nie; die data word herïnterpreteer. As ‘n pasiënt ‘n Freudiaanse interpretasie aanvaar, bewys dit die interpretasie; as hy dit verwerp, is dit “weerstand,” wat dit óók bewys. Sulke stelsels was, volgens Popper, onweerlegbaar, en presies daarom nie wetenskaplik nie. Hy het dit gekontrasteer met Einstein se relatiwiteitsteorie, wat spesifieke, toetsbare voorspellings gemaak het wat in beginsel verkeerd kon wees. Toe Arthur Eddington die buiging van lig tydens ‘n sonsverduistering in 1919 gemeet het, het die waarneming die teorie bevestig. Maar die punt was dat dit ook die teorie kon weerlê het. Dit was die merk van ware wetenskap.
Hierdie beginsel het verreikende implikasies.
‘n Teorie wat duisend toetse oorleef het, is sterk bevestig, maar dit is nie bewys nie. Die duisend-en-eerste toets mag dit nog weerlê. Daarom praat wetenskaplikes van “teorieë” eerder as “waarhede,” nie omdat hulle onseker is oor alles nie, maar omdat die wetenskaplike metode erken dat alle kennis voorlopig is.
Dan is daar die asimmetrie van bewys en weerlê. Jy kan nooit bewys dat alle swane wit is nie (want jy het nie alle swane ondersoek nie), maar jy kan met een swart swaan bewys dat nie alle swane wit is nie. Wetenskap vorder deur hipoteses uit te skakel, nie deur dit vir ewig vas te stel nie. Popper het geskryf dat ons nooit sekerheid bereik nie; ons word net al hoe beter daarin om ons foute te identifiseer.
En dan die punt wat dikwels gemis word: wat nie falsifiseerbaar is nie, is nie wetenskaplik nie, maar dit is nie noodwendig onsin nie. Popper se beginsel is ‘n afbakeningskriterium wat wetenskap van nie-wetenskap onderskei. Maar dit sê nie dat alles wat nie-wetenskap is, waardeloos is nie. Etiek, estetika, metafisika, teologie: hierdie dissiplines val buite die wetenskaplike metode, maar dit beteken nie hulle is sonder waarde of waarheid nie. Hulle lewer eenvoudig ‘n ander tipe kennis as empiriese wetenskap.
Popper se werk wys dat wetenskap self erken dat dit nie alles kan bewys nie, en dat die grense van die wetenskap nie die grense van die werklikheid is nie.
Thomas Kuhn: Paradigmaskuiwe en die Menslike Kant van Wetenskap
As Popper ons gewys het hoe wetenskap behoort te werk, het Thomas Kuhn (1922–1996) ons gewys hoe dit werklik werk. In sy boek The Structure of Scientific Revolutions (1962) het Kuhn die geskiedenis van die wetenskap nagespeur en iets verrassends gevind: wetenskap vorder nie in ‘n gladde, kumulatiewe lyn nie. Dit beweeg in skokkende spronge.
Kuhn het die konsep van die paradigma bekendgestel. ‘n Paradigma is die oorheersende raamwerk waarbinne wetenskaplikes op enige gegewe tydstip werk. Nie net ‘n teorie nie, maar ‘n hele manier van kyk: ‘n stel aannames, metodes, en vrae wat as belangrik beskou word.
Die meeste van die tyd, sê Kuhn, doen wetenskaplikes wat hy “normale wetenskap” noem. Hulle werk binne die paradigma, los probleme op wat die paradigma definieer, pas die raamwerk toe op nuwe gevalle. Soos om legkaarte op te los binne die reëls van ‘n bepaalde spel.
Maar soms begin anomalieë ophoop, waarnemings wat nie binne die paradigma pas nie. Aanvanklik word hulle geïgnoreer of wegverklaar. Mettertyd word hulle te veel en te ernstig. Dan breek ‘n krisis uit, en uiteindelik gebeur daar ‘n paradigmaskuif: die ou raamwerk word verwerp en ‘n nuwe een neem sy plek in.
Dink aan die geskiedenis: die Ptolemaiese model het die aarde in die middel van die heelal geplaas, met die son, maan en planete wat in sirkels daarom wentel. Vir meer as ‘n duisend jaar het dit gewerk — redelik goed, met sekere aanpassings (soos die beroemde episiklusse, klein sirkels bo-op groot sirkels, om die waargenome bewegings van die planete te verklaar). Maar anomalieë het opgehoop. Kopernikus, Kepler en Galileo het ‘n nuwe paradigma voorgestel: die son is in die middel, en die aarde wentel daarom. Dit was nie net ‘n klein aanpassing nie. Dit was ‘n totale verandering van perspektief.
‘n Meer onlangse voorbeeld: aan die einde van die negentiende eeu het die Newtoniaanse fisika as bykans voltooid beskou. Lord Kelvin sou na bewering gesê het dat daar net twee klein wolkies aan die fisika se horison is. Daardie twee “wolkies” het ontplof in die twee grootste revolusies van die twintigste-eeuse fisika: die kwantummeganika en Einstein se relatiwiteitsteorie. Die hele raamwerk waarbinne fisici gedink het, is omvergewerp: die absolute karakter van tyd en ruimte, die voorspelbaarheid van deeltjies, die aard van lig. Nie omdat die ou fisika “verkeerd” was nie (Newton se wette werk nog uitstekend vir alledaagse toepassings), maar omdat ‘n dieper werklikheid sigbaar geword het wat ‘n groter raamwerk vereis het.
Kuhn se werk het ‘n paar belangrike insigte vir ons.
Wetenskap is nie ‘n suiwer rasionele proses nie. Paradigmaskuiwe word nie net deur data gedryf nie, maar ook deur sosiale, kulturele en psigologiese faktore. Wetenskaplikes is mense. Hulle het lojaliteite, emosies, reputasies om te beskerm, en hulle is geneig om die paradigma te verdedig waarbinne hulle opgelei is. Max Planck, self ‘n groot fisikus, het droogweg opgemerk: “A new scientific truth does not triumph by convincing its opponents… but rather because its opponents eventually die, and a new generation grows up that is familiar with it.”
Daar is ook geen “God’s-eye view” in die wetenskap nie. Wetenskaplikes kyk altyd deur die lens van ‘n paradigma. Hulle sien die werklikheid deur ‘n raamwerk, en daardie raamwerk bepaal in ‘n groot mate wat hulle sien en nie sien nie. Dit beteken nie dat wetenskap willekeurig of onbetroubaar is nie. Dit beteken dat dit menslik is, met al die krag en beperkings wat dit meebring.
En wetenskaplike “vooruitgang” is kompleks. Ná ‘n paradigmaskuif is die nuwe paradigma nie noodwendig in elke opsig “beter” as die oue nie. Dit los ander probleme op, stel ander vrae, sien die wêreld op ‘n ander manier. Kuhn was versigtig om te sê dat wetenskap noodwendig nader aan die “waarheid” beweeg. Eerder het hy gesê dit word meer doeltreffend in probleemoplossing.
Michael Polanyi: Stilswyende Kennis en Persoonlike Betrokkenheid
Die Hongaars-Britse wetenskaplike en filosoof Michael Polanyi (1891–1976) het ‘n ander dimensie van wetenskap belig. In sy hoofwerk Personal Knowledge (1958) het hy betoog dat alle kennis, ook wetenskaplike kennis, ‘n persoonlike en stilswyende (tacit) komponent het.
Wat beteken dit? Polanyi het opgemerk dat ‘n wetenskaplike meer weet as wat hy in formules en data kan neerskryf. ‘n Goeie eksperimenteerder het ‘n gevoel vir wanneer ‘n eksperiment reg loop, ‘n intuïsie oor watter hipoteses die moeite werd is om te vervolg. Hierdie kennis word nie uit handboeke geleer nie. Dit word opgebou deur jare se opleiding, mentorskap en praktiese ervaring. Soos die vermoë om ‘n fiets te ry: jy kan dit nie volledig verduidelik in woorde nie, maar jy weet dit.
Polanyi het dit “tacit knowledge” genoem, stilswyende kennis. Hy het betoog dat hierdie stilswyende dimensie nie ‘n toevallige bykomstigheid van die wetenskap is nie, maar die fondament waarop alle formele wetenskaplike kennis rus.
Die gevolge hiervan is verreikend.
Wetenskap is nie ‘n koel, afstandelike proses nie. Dit is ‘n diep persoonlike onderneming wat vertroue, toewyding en oordeel vereis. ‘n Wetenskaplike kies om ‘n bepaalde probleem te ondersoek, hy vertrou sy mentors en die tradisie waarbinne hy werk, en hy maak oordele wat nie ten volle deur reëls of algoritmes bepaal kan word nie.
Wetenskap berus ook op ‘n tradisie. Net soos ‘n ambagsman sy vaardighede binne ‘n meester-leerlingsverhouding leer, word wetenskaplikes opgelei binne ‘n tradisie. Hulle leer nie net feite en formules nie; hulle leer ‘n manier van dink, van sien, van oordeel. Hierdie tradisie word nie outomaties oorgedra nie. Dit vereis persoonlike betrokkenheid en vertroue.
En die objektiwiteit van die wetenskap is nie absoluut nie. Dit beteken nie dat wetenskap subjektief is in die sin van willekeurig nie. Maar die idee van ‘n suiwer objektiewe, waardevrye wetenskap is ‘n mite. Elke wetenskaplike bring sy persoon, sy oortuigings en sy oordeel na die tafel. Die beste wetenskap is nie dié wat hierdie menslike dimensie ontken nie, maar dié wat dit erken en verantwoordelik daarmee omgaan.
Vir ons as gelowiges is Polanyi se werk besonder insiggewend. Die vertroue en toewyding wat in die wetenskap werk, is nie so anders van die vertroue en toewyding wat in geloof werk nie. Die wetenskaplike glo dat die natuur ordelik en verstaanbaar is. Hy vertrou dat sy sintuie en sy rede betroubaar is. Hy wy homself toe aan ‘n tradisie en ‘n gemeenskap. Hierdie “geloofsakte” is nie irrasioneel nie. Hulle is die noodsaaklike voorwaardes vir enige kennisverkryging.
Polanyi het ook gewys dat daar ‘n hiërargie van kennisdomeine bestaan wat nie tot mekaar gereduseer kan word nie. Die wette van fisika verklaar nie biologie nie, al is biologie op fisika gebou. Die wette van biologie verklaar nie bewussyn nie, al is bewussyn verbonde aan biologiese prosesse. Elke hoër vlak het sy eie beginsels wat nie bloot uit die laer vlak afgelei kan word nie. Die aanspraak dat “alles uiteindelik fisika is” ignoreer die wyse waarop werklikheid in lae bestaan wat elkeen hul eie verklarings vereis.
Imre Lakatos: Navorsingsprogramme en Wetenskaplike Rasionaliteit
Die Hongaarse filosoof Imre Lakatos (1922–1974) het probeer om ‘n middeweg te vind tussen Popper se rasionalisme en Kuhn se sosiologiese benadering. Sy model van navorsingsprogramme bied ‘n genuanseerde siening van hoe wetenskaplikes werklik besluite neem oor wat om te glo en wat om te verwerp.
Volgens Lakatos bestaan ‘n navorsingsprogram uit ‘n harde kern van sentrale aannames wat nie onderhandel word nie, en ‘n beskermende gordel van hulpipoteses wat aangepas kan word as probleme opduik. Wetenskaplikes verdedig nie individuele hipoteses nie; hulle verdedig hele programme.
‘n Navorsingsprogram is progressief as dit nuwe feite voorspel en nuwe ontdekkings moontlik maak. Dit is degenererend as dit slegs reageer op probleme deur ad hoc-aanpassings te maak sonder om iets nuuts te ontdek. Mettertyd vervang progressiewe programme die degenererandes.
Die belang van Lakatos se model vir ons bespreking is dit: selfs die keuse oor watter navorsingsprogram om te volg, is nie ‘n suiwer meganiese proses nie. Dit vereis oordeel, geduld, en soms selfs geloof dat ‘n program wat tans probleme ondervind, uiteindelik sal slaag. Wetenskaplikes moet soms teen die heersende opinie ingaan, soms teen die data soos dit tans lyk, omdat hulle vertrou dat hul program se harde kern uiteindelik vrug sal dra.
Dit klink nie vreemd vertroud nie? Die struktuur van ‘n navorsingsprogram, met sy ononderhandelbare kern en sy buigsame periferie, is nie heeltemal anders as hoe gelowiges oor hul belydenis dink nie. Daar is kernwaarhede wat vas staan (die “harde kern”), en daar is toepassings en interpretasies wat met nuwe insigte ontwikkel (die “beskermende gordel”).
Die filosofie van die wetenskap, van Popper tot Kuhn tot Polanyi tot Lakatos, wys ons ‘n konsekwente prentjie: wetenskap is ‘n menslike onderneming. Kragtig, betroubaar in sy domein, self-korrigerend oor tyd. Maar nie die koel, onpersoonlike masjien wat populêre kultuur daarvan maak nie. Dit berus op aannames, vereis oordeel, word beïnvloed deur tradisie en gemeenskap, en het inherente grense.
Dit beteken nie dat wetenskap onbetroubaar is nie. Dit beteken dat ons dit moet waardeer vir wat dit is eerder as om dit te vergoddelik tot iets wat dit nie is nie.
3. Sciëntisme teenoor Wetenskap: Die Noodsaaklike Onderskeid
Hier kom ons by een van die belangrikste onderskeidings in hierdie hele reeks: die onderskeid tussen wetenskap en sciëntisme. Die verwarring tussen hierdie twee is verantwoordelik vir baie onnodige konflik en misverstand.
Wetenskap is ‘n metode om die natuurlike wêreld te bestudeer deur empiriese waarneming, hipotesevorming, toetsing en hersiening. Dit is ‘n pragtige, kragtige instrument.
Sciëntisme is die filosofiese aanspraak dat die wetenskaplike metode die enigste geldige manier is om kennis te bekom, dat slegs dit wat wetenskaplik bewys kan word, waar of betekenisvol is.
Die verskil is wesenlik. Wetenskap is ‘n metode; sciëntisme is ‘n metafisika. Wetenskap bestudeer die natuur; sciëntisme beweer dat die natuur al is wat daar is. Wetenskap sê: “Hierdie is wat ons kan waarneem en meet.” Sciëntisme sê: “As jy dit nie kan waarneem en meet nie, bestaan dit nie.”
Die Selfvernietigende Aard van Sciëntisme
Hier is die kernprobleem met sciëntisme: dit ondermyn sigself.
Die stelling “Slegs wetenskaplike aansprake is geldig” is self nie ‘n wetenskaplike aanspraak nie. Geen eksperiment kan dit bewys nie. Geen laboratorium kan dit toets nie. Geen empiriese waarneming kan dit bevestig nie. Dit is ‘n filosofiese stelling, presies die soort stelling wat sciëntisme ongeldig verklaar.
Met ander woorde: sciëntisme gebruik filosofie om filosofie te ontken. Dit staan op die leer van metafisika om die leer onder homself uit te skop. Dis soos om te sê “Daar is geen ander taal as Engels nie,” in Engels. Die stelling weerspreek homself nie op die oppervlak nie, maar die oomblik wat jy daaroor nadink, besef jy dit is logies inkonsekwent.
Ludwig Wittgenstein, een van die twintigste eeu se invloedrykste filosowe, het ‘n treffende metafoor gebruik wat hierop van toepassing is. In sy Tractatus Logico-Philosophicus (1921) skryf hy dat die proposisies van sy boek soos ‘n leer is: iemand wat daarop klim, moet uiteindelik erken dat die leer self oorskry moet word. Die raamwerk wat ons gebruik om die grense van taal en kennis af te baken, val self nie bínne daardie grense nie. Die sciëntis gebruik presies so ‘n “leer”: hy gebruik filosofie om te beweer dat filosofie onnodig is, en dan moet hy die leer wegtrap en hoop dat hy nie val nie.
Sir Peter Medawar het dit met kenmerkende helderheid gestel:
“There is no quicker way for a scientist to bring discredit upon himself and upon his profession than roundly to declare — particularly when no declaration of any kind is called for — that science knows, or soon will know, the answers to all questions worth asking.”
Medawar het nie bedoel dat wetenskaplikes dom is nie. Hy het bedoel dat ‘n wetenskaplike wat beweer dat sy metode die enigste pad na waarheid is, nie meer as wetenskaplike praat nie. Hy filosofeer. En gewoonlik sonder om dit te besef.
Die Geskiedenis van Sciëntisme
Waar kom sciëntisme vandaan? Nie uit die wetenskap self nie. Baie grondleggers van die moderne wetenskap, soos Galileo, Newton, Boyle en Faraday, was diep gelowige mense wat nooit sou beweer het dat die wetenskap die enigste bron van kennis is nie. Sciëntisme het eerder sy wortels in die Verligtingsfilosofie van die agttiende en negentiende eeu, en in die positivisme van Auguste Comte, wat geleer het dat die mensdom deur drie stadiums van ontwikkeling gaan: die teologiese, die metafisiese en die positivistiese (wetenskaplike). In Comte se stelsel sou die wetenskap uiteindelik alle ander vorme van denke vervang.
Hierdie visie het groot invloed gehad, maar dit is self nie wetenskaplik nie. Dit is ‘n filosofiese narratief oor die geskiedenis en die bestemming van die mensdom. Ironies genoeg is die positivisme deur die twintigste-eeuse filosofie self in ‘n groot mate verwerp. Die logiese positiviste van die Weense Kring het probeer om alle betekenisvolle stellings te reduseer tot empiries verifieerbare stellings, en het ontdek dat hierdie beginsel sigself nie kan oorleef nie. Die verifikasiebeginsel (“slegs verifieerbare stellings is betekenisvol”) is self nie verifieerbaar nie. Die positivisme het sy eie doodsvonnis geteken.
Tog leef sciëntisme voort in die populêre kultuur, veral in die werke van die sogenaamde “Nuwe Ateïste” soos Richard Dawkins, Sam Harris en die oorlede Christopher Hitchens. Hierdie skrywers is bekwaam in hul eie velde, maar wanneer hulle beweer dat die wetenskap die enigste betroubare pad na kennis is, verlaat hulle die wetenskap en betree hulle die filosofie. Gewoonlik sonder om dit te besef, en sonder die dissipline wat goeie filosofie vereis.
Hoe Herken Jy Sciëntisme?
Sciëntisme kom nie altyd in ‘n ooglopende vorm nie. Dit versteek dikwels in oënskynlik redelike stellings:
- “Ek glo net wat bewys kan word.” (Maar kan jy bewys dat slegs bewysbare dinge waar is?)
- “As die wetenskap dit nie kan vind nie, bestaan dit nie.” (Dit is soos om te sê: “As my metaalverklikker dit nie optel nie, is daar geen hout in die bos nie.”)
- “Alles is uiteindelik verklaarbaar deur fisika.” (Dit is ‘n geloofsbelydenis, ‘n metafisiese aanname, nie ‘n wetenskaplike bevinding nie.)
- “Ons sal eendag alles wetenskaplik kan verklaar.” (Eendag is nie wetenskap nie. Dit is hoop. En hoewel daar niks verkeerd met hoop is nie, moet ons dit nie verwar met empiriese bewys nie.)
Die punt is nie dat hierdie mense kwaadwillig is nie. Baie mense wat sciëntisme aanhang, is opreg en intelligent. Hulle het net nie besef dat hulle ‘n filosofiese posisie inneem nie. Hulle dink hulle “volg net die wetenskap.”
Alvin Plantinga se Waarneming
Die gereformeerde filosoof Alvin Plantinga het in sy boek Where the Conflict Really Lies (2011) ‘n skerpsinige punt gemaak: die werklike konflik in ons tyd is nie tussen wetenskap en geloof nie. Dit is tussen sciëntisme en geloof. Wetenskap, reg verstaan, is ‘n bondgenoot van die geloof, nie ‘n vyand nie. Maar sciëntisme, die filosofiese aanspraak dat niks buite die natuurlike wêreld bestaan nie, is ‘n rivaliserende geloofstelsel. En dit is ‘n geloofstelsel wat nie eens bewus is dat dit een is nie.
Hierdie onderskeid is bevrydend. ‘n Gelowige hoef nie te kies tussen wetenskap en geloof nie. Jy kan die wetenskap volledig omhels as ‘n kragtige instrument om God se skepping te bestudeer, en terselfdertyd die filosofiese oordrewe aansprake van sciëntisme van die hand wys. Dit is nie anti-wetenskap nie. Dit is pro-wetenskap en pro-eerlikheid oor die grense van die wetenskaplike metode.
4. Die Voorveronderstellings van die Wetenskap
Hier kom ons by wat miskien die diepste punt van hierdie sessie is, die punt wat regstreeks verbind met alles wat ons in Reeks 1 bespreek het.
Die wetenskap werk. Dit lewer resultate. Dit maak voorspellings wat klop. Maar waarom werk dit? Die meeste wetenskaplikes dink nie daaroor na nie; hulle is te besig om wetenskap te doen. Maar wanneer ons wel daaroor nadink, ontdek ons iets merkwaardigs: die wetenskap berus op ‘n reeks voorveronderstellings, aannames wat dit nie self kan bewys nie.
1. Die eksterne wêreld bestaan en is werklik.
Dit klink so voor-die-hand-liggend dat dit skaars die moeite werd is om te noem. Maar dink daaraan: die wetenskap aanvaar dat daar ‘n werklike wêreld “daar buite” bestaan, onafhanklik van ons waarneming. Dit is nie iets wat die wetenskap kan bewys nie, want elke bewys sou reeds aanvaar dat die wêreld werklik is. Dit is ‘n metafisiese aanname, ‘n filosofiese oortuiging wat aan die wetenskap voorafgaan.
Filosowe deur die eeue het geworstel met die vraag of die eksterne wêreld werklik is. Van Descartes se cogito ergo sum tot Berkeley se idealisme tot die brein-in-‘n-vat-gedagte-eksperiment: die punt is nie dat die wêreld onwerklik is nie, maar dat die oortuiging dat dit werklik is, self nie wetenskaplik bewys kan word nie. Dit is ‘n vertrekpunt, nie ‘n gevolgtrekking nie.
2. Die heelal is rasioneel georden en volg konsekwente wette.
Die wetenskap aanvaar dat die natuur patroonmatig is, dat dieselfde oorsake onder dieselfde omstandighede dieselfde gevolge sal hê. Sonder hierdie aanname is wetenskap onmoontlik. As die natuur willekeurig was, as swaartekrag vandag trek en môre stoot, as water soms na bo vloei en ander kere na onder, sou geen eksperiment enige sin maak nie.
Maar waarom is die natuur so? Waarom gehoorsaam die heelal wiskundige wette? Waarom is daar orde eerder as chaos? Hierdie vrae kan die wetenskap nie beantwoord nie, want die wetenskap aanvaar reeds die orde as sy vertrekpunt. Soos Einstein opgemerk het:
“The eternal mystery of the world is its comprehensibility… The fact that it is comprehensible is a miracle.”
Einstein het die woord “mirakel” nie in ‘n tegnies-teologiese sin gebruik nie, maar sy punt was diepgaande: die feit dat die heelal verstaanbaar is, is self iets wat verklaring benodig. En daardie verklaring kan nie vanuit die wetenskap alleen kom nie.
3. Ons verstand kan hierdie orde betroubaar waarneem en beredeneer.
Die wetenskap aanvaar nie net dat die wêreld ordelik is nie. Dit aanvaar ook dat ons verstande toegerus is om daardie orde te begryp. Ons logika, ons wiskunde, ons redeneervermoë: die wetenskap vertrou dat hierdie vermoëns betroubaar is, dat hulle ons na ware insigte oor die werklikheid lei.
Maar waarom sou dit so wees? As ons verstande bloot die produkte van ‘n blinde, doellose evolusionêre proses is, as daar geen rasionele grond agter die werklikheid is nie, waarom sou ons dan verwag dat ons denke die werklikheid betroubaar weerspieël? Die evolusieteorie (in die naturalistiese sin) sê dat ons brein ontwikkel het om ons te help oorleef, nie om waarheid te ontdek nie. ‘n Wese wat sekere illusies handhaaf, mag net so goed oorleef as een wat die werklikheid akkuraat waarneem.
Dit is presies die punt wat Alvin Plantinga maak in sy beroemde Evolutionary Argument Against Naturalism (EAAN): as naturalisme waar is en ons kognitiewe vermoëns bloot die produk van ongestuurde evolusie is, het ons geen goeie rede om te vertrou dat ons oortuigings waar is nie, insluitend die oortuiging dat naturalisme self waar is. Naturalisme ondermyn die betroubaarheid van die rede wat ons nodig het om naturalisme te beoordeel. Dit is ‘n diep ironie.
4. Wiskunde beskryf die fisiese werklikheid.
Die natuurwetenskappe, en veral die fisika, maak wyd gebruik van wiskunde. Natuurwette word uitgedruk in wiskundige vergelykings. En dit werk: die wiskundige modelle voorspel die werklikheid met verbysterende akkuraatheid.
Maar waarom? Wiskunde is op die oog af ‘n abstrakte, verstandelike aktiwiteit. Dit handel oor getalle, vorms en strukture wat nie fisies bestaan nie. Waarom sou ‘n abstrakte skepping van die menslike verstand die fisiese heelal so akkuraat beskryf? Die fisikus Eugene Wigner het in ‘n beroemde artikel gepraat oor “the unreasonable effectiveness of mathematics in the natural sciences”, die onredelike doeltreffendheid van wiskunde. Hy het geen verklaring daarvoor gehad nie. Vanuit ‘n naturalistiese raamwerk is dit ‘n raaisel. Vanuit ‘n teïstiese raamwerk maak dit volkome sin: ‘n rasionele God het ‘n wiskundig-gestruktureerde heelal geskep en rasionele wesens gemaak wat in staat is om daardie struktuur te ontdek.
5. Die eenvormigheid van die natuur (die toekoms sal op die verlede lyk).
Die wetenskap aanvaar dat die natuurwette altyd en oral geld, dat die wette wat vandag geld, ook môre sal geld, en ook in vêr-af sterrestelsels. Sonder hierdie aanname kan geen wetenskaplike voorspelling gemaak word nie. Maar die filosoof David Hume het reeds in die agttiende eeu aangetoon dat hierdie aanname nie logies bewys kan word nie. Die feit dat die son tot nou toe elke dag opgekom het, bewys nie dat dit môre sal opkom nie. Dit gee ons net ‘n sterk gewoonte van verwagting.
Dit staan bekend as die probleem van induksie: die sprong van “dit het tot dusver so gebeur” na “dit sal altyd so gebeur” is logies nie gewaarborg nie. Die wetenskap aanvaar induksie, maar kan dit nie bewys nie. Nog ‘n voorveronderstelling. Nog ‘n geloofsakte.
En hier is die punt wat alles saamtrek, die punt wat ons terugbring na Reeks 1 en die hart van hierdie bespreking.
Elkeen van hierdie voorveronderstellings is ‘n metafisiese aanname: die werklikheid van die wêreld, die rasionele orde van die natuur, die betroubaarheid van die verstand, die toepaslikheid van wiskunde, die eenvormigheid van die natuur. Geen een daarvan kan deur die wetenskap self bewys word nie. Die wetenskap berus daarop; dit bewys dit nie.
Maar hier is die merkwaardige ding: elkeen van hierdie aannames is presies wat ‘n klassiek-teïstiese wêreldbeskouing sou voorspel.
As daar ‘n rasionele God is wat die heelal geskep het, dan sou ons verwag dat:
- die wêreld werklik en substansieel is (dit is God se skepping, nie ‘n illusie nie);
- die natuur ordelik en wetmatig is (dit weerspieël die rasionele aard van die Skepper);
- ons verstande in staat is om die natuur te begryp (ons is gemaak na die beeld van die Rasionele God, die imago Dei);
- wiskunde die natuur beskryf (beide die wiskundige struktuur van die heelal en ons wiskundige vermoë kom van dieselfde Bron);
- die natuur konsekwent is (God is getrou en hou sy skepping in stand).
Met ander woorde: die voorveronderstellings waarop die wetenskap berus, word die beste verklaar deur die klassieke teïsme. Die wetenskap, sonder om dit te besef, opereer binne ‘n raamwerk wat die meeste sin maak as God bestaan.
Dit is nie ‘n “God of the gaps”-argument nie. Ons sê nie “ons kan dit nie verklaar nie, dus God” nie. Dit is presies die teenoorgestelde. Die wetenskap werk, en die vraag is waarom dit werk. Die antwoord lê nie in ‘n gaping in ons kennis nie, maar in die fondament van alle kennis. Dis soos om te vra waarom die vloer jou kan dra. Die antwoord is nie ‘n gaping in die vloer nie; dit is die fondament onder die vloer.
Herman Bavinck, die groot gereformeerde teoloog, het in sy Gereformeerde Dogmatiek uitgebreid geskryf oor die verhouding tussen God se algemene openbaring en menslike kennis. God openbaar Homself nie net in die Skrif nie, maar ook in die skepping, in die orde, die skoonheid, die wetmatigheid van die natuur. Die wetenskap, wanneer dit die natuur bestudeer, bestudeer in werklikheid God se werke. Bavinck het gestel dat die moontlikheid van alle ware kennis berus op die feit dat God die menslike verstand geskep het om in verhouding met sy skepping te staan, dat daar ‘n korrespondensie is tussen ons denke en die werklikheid, omdat beide hul oorsprong in dieselfde God vind.
Abraham Kuyper het dit vanuit ‘n ander hoek belig met sy beginsel van soewereiniteit in eie kring. Kuyper het geleer dat elke sfeer van die lewe (wetenskap, kuns, kerk, staat, gesin) sy eie domein het wat deur God ingestel is. Wetenskap het sy eie sfeer en sy eie wetmatighede. Dit is nie die taak van die kerk om die wetenskap voor te skryf wat dit moet vind nie, en dit is nie die taak van die wetenskap om die teologie oorbodig te verklaar nie. Elke sfeer het sy eie gesag en sy eie beperkings, en almal staan onder die soewereiniteit van God.
Hierdie beginsel is bevrydend in twee rigtings. Aan die een kant vry dit die wetenskap van kerklike oorheersing: die wetenskaplike mag sy navorsing volg waarheen dit ook al lei, sonder dat die kerk hom beperk. Aan die ander kant vry dit die teologie van wetenskaplike imperialisme: die wetenskap het nie die reg om te verklaar dat dit die enigste geldige kennisbron is nie, want dit oorskry dan sy eie sfeer. Kuyper se raamwerk gee aan elkeen sy plek sonder om die ander se terrein te annekseer.
Ons kan die wetenskap omhels sonder om ons geloof prys te gee, en ons geloof bely sonder om die wetenskap te verwerp. Die twee is nie in kompetisie nie. Hulle opereer in verskillende sfere, onder dieselfde God.
Dit is, soos ons in Reeks 1 bespreek het, die Logos, die Goddelike Rede wat die werklikheid struktureer. Johannes 1:1-3 sê: “In die begin was die Woord, en die Woord was by God, en die Woord was God. Alles het deur Hom ontstaan, en sonder Hom het niks ontstaan wat bestaan nie.” Die Logos is nie net ‘n godsdienstige idee nie. Dit is die grond van die rasionele struktuur van die werklikheid wat die wetenskap bestudeer. Wanneer ‘n fisikus ‘n wiskundige wet ontdek wat die natuur beskryf, ontdek hy ‘n uitdrukking van die Logos. Wanneer ‘n bioloog die kompleksiteit van die sel ondersoek, kyk hy na die handewerk van die Logos.
Die wetenskap, reg verstaan, is nie ‘n bedreiging vir die geloof nie. Dit is, op ‘n diep vlak, ‘n uitdrukking daarvan.
5. Wat die Wetenskap Nie Kan Beantwoord Nie
Die wetenskap is ‘n kragtige instrument binne sy domein. Maar wat lê buite daardie domein? Watter vrae is wesenlik buite die bereik van die wetenskaplike metode? Dit is nie ‘n retoriese vraag nie. Dit is ‘n konkreet-filosofiese een, en dit het direk te make met die vrae wat mense die meeste in die lewe pla.
Waarom is daar iets eerder as niks?
Hierdie vraag, wat Leibniz die uiteindelike vraag genoem het en wat ons breedvoerig in Reeks 1 bespreek het, val heeltemal buite die wetenskap se bereik. Die wetenskap kan die struktuur van dit wat bestaan bestudeer, maar nie die feit dat dit bestaan nie. Die fisika kan verduidelik hoe materie en energie wisselwerk, maar nie waarom daar materie en energie is om mee wissel te werk nie.
Selfs as ‘n fisikus sou beweer dat die heelal uit “niks” ontstaan het (soos sommige kosmologiese modelle suggereer), is daardie “niks” nie werklik niks nie. Dit is ‘n kwantumvakuum met wiskundige eienskappe en fisiese potensiaal. Dit is ‘n iets. Die vraag “Waarom is daar hoegenaamd iets?” bly staan.
Wat is bewussyn?
Die sogenaamde moeilike probleem van bewussyn (hard problem of consciousness), soos die filosoof David Chalmers dit genoem het, is een van die diepste raaisels van ons tyd. Ons weet dat breinaktiwiteit met bewuste ervaring gepaardgaan. Maar waarom? Waarom is daar ‘n subjektiewe “hoe dit voel” wanneer sekere neurone vuur? Waarom is die brein nie bloot ‘n donker, onbewuste masjien wat inligting verwerk sonder enige innerlike ervaring nie?
Die neurowetenskap kan korrelasies identifiseer: “hierdie breinarea is aktief wanneer jy pyn ervaar.” Maar dit verduidelik nie waarom daar ‘n subjektiewe ervaring van pyn is nie. Dit is nie ‘n gaping in ons huidige kennis nie; dit is ‘n wesenlike grens van die fisies-empiriese benadering. Ons sal hierdie tema in Sessie 6 van hierdie reeks in diepte bespreek.
Wat is moreel reg?
Die wetenskap kan beskryf wat mense doen: hulle gedrag, hulle neigings, die evolusionêre oorsprong van morele intuïsies. Maar dit kan nie sê wat mense behoort te doen nie. Die sprong van “is” na “behoort,” wat die filosoof David Hume die is-behoort-skeiding genoem het, is nie ‘n wetenskaplike sprong nie. Dit is ‘n filosofiese en morele een.
‘n Neurowetenskap kan wys dat mense ‘n emosionele reaksie het wanneer hulle onreg sien. Maar dit kan nie sê dat onreg verkeerd is nie; slegs dat mense dit voel as verkeerd. As moraliteit niks meer is as breinstrome nie, dan het die stelling “dit is verkeerd om kinders te mishandel” geen meer gesag as “ek het ‘n afkeer van spinasie” nie. Die meeste mense besef intuïtief dat dit absurd is, dat moraliteit meer is as persoonlike voorkeur. Maar daardie “meer” val buite die wetenskap se domein.
Wat is die betekenis van die lewe?
Waarom is ons hier? Waarvoor lewe ons? Het die lewe ‘n doel? Hierdie vrae is universeel en diep menslik, maar hulle is nie wetenskaplike vrae nie. Die biologie kan verduidelik hoe lewe ontstaan het en hoe dit funksioneer. Dit kan nie sê waarvoor dit is nie.
Die fisikus Steven Weinberg het geskryf: “The more the universe seems comprehensible, the more it also seems pointless.” Maar merk op: Weinberg het nie gesê die wetenskap het bewys dat die heelal sinneloos is nie. Hy het gesê dit lyk so vanuit ‘n suiwer wetenskaplike perspektief. Natuurlik lyk dit so. Die wetenskap is nie ontwerp om sin te vind nie; dit is ontwerp om meganismes te vind. Om te sê dat die heelal “sinneloos lyk” vanuit ‘n wetenskaplike perspektief, is soos om te sê dat ‘n sonsondergang “kleurloos lyk” wanneer jy dit deur ‘n swart-wit-kamera bekyk. Die beperking lê in die instrument, nie in die werklikheid nie.
Dink daaraan hoe absurd dit sou wees as ‘n skeikundige sou sê: “Ek het Rembrandt se Nagwag ontleed. Dit bestaan uit verf, pigmente, olies, bindmiddels op doek. Daar is geen betekenis in hierdie materiaal te vind nie. Dus het die skildery geen betekenis.” Die ontleding is korrek. Die skildery is materiaal. Maar die gevolgtrekking is absurd. Die betekenis van die skildery is werklik, maar dit val op ‘n ander vlak as wat die skeikunde kan meet. Net so is die betekenis van die lewe werklik, maar dit val op ‘n vlak wat die fisika en biologie nie kan bereik nie.
Die Prediker het lankal geweet dat die lewe, sonder ‘n transendente verwysingsraam, “tevergeefs” lyk. “Alles is tevergeefs,” begin die boek Prediker (1:2). Maar die Prediker se gevolgtrekking is nie nihilisme nie. Dit is dat die lewe sonder God leeg is, en dat die vrees van die Here en die onderhouding van sy gebooie die “slotsom van die saak” is (Pred. 12:13). Die leegheid wat die naturalis ervaar, is nie ‘n bewys dat daar geen sin is nie. Dit is ‘n simptoom van ‘n wêreldbeskouing wat te klein is vir die werklikheid.
Waarom is die heelal rasioneel georden?
Dit is miskien die diepste vraag van almal. Die wetenskap ontdek orde in die natuur. Maar waarom is daar orde? Waarom gehoorsaam die heelal wiskundige wette? Waarom is die werklikheid verstaanbaar?
Hierdie vraag kan nie vanuit die wetenskap beantwoord word nie, want die wetenskap aanvaar die orde as sy vertrekpunt. Om te sê “die wette van die natuur verklaar die orde” is sirkelvormig. Dis soos om te sê “die reëls van die spel verklaar waarom daar ‘n spel is.” Die reëls beskryf die orde; hulle verklaar dit nie.
Die wiskundige en fisikus Roger Penrose het bereken dat die aanvanklike toestand van die heelal so presis moes wees dat die kans om dit by toeval te kry, 1 in 10^(10^123) is, ‘n getal so groot dat dit alle bestaande atome in die heelal oorskry. Die wetenskap kan hierdie presisie beskryf, maar dit kan nie verklaar waarom die heelal so fyn afgestem is nie. Dit kan sê hoe die wette werk, maar nie waarom daar sulke wette is nie. En dit is presies waar die filosofie en die teologie onontbeerlik word.
As die heelal die produk is van ‘n Rasionele God — die Logos van Johannes 1 — dan is die rasionele orde van die natuur nie ‘n onverklaarbare geluksak nie. Dit is die uitdrukking van die Skepper se aard. Die orde is daar omdat die Ordenaar daar is. Die wetmatigheid van die natuur weerspieël die trou van die God wat dit in stand hou. Soos Jeremia 33:25–26 dit stel: “As Ek my verbond met dag en nag nie in stand gehou het nie, die wette van hemel en aarde nie vasgestel het nie…” God self verbind sy trou aan sy skepping aan die konsekwentheid van die natuurwette.
Hierdie vrae is nie “probleme” wat die wetenskap nog net nie opgelos het nie. Hulle is nie “gapings” wat een of ander toekomstige ontdekking sal vul nie. Hulle val wesenlik buite die wetenskaplike domein, soos die vraag “Watter kleur is die noot C?” buite die domein van die musiek val. Die vraag is nie onsin nie. Dit is net die verkeerde soort vraag vir daardie spesifieke dissipline.
‘n Wetenskaplike wat sê “die wetenskap kan dit nie beantwoord nie, dus is die vraag sinneloos” het ‘n filosofiese fout gemaak. Hy het die grense van sy instrument verwar met die grense van die werklikheid. Dis soos ‘n man wat net ‘n hamer het en dan beweer dat alles ‘n spyker is. Die hamer is ‘n uitstekende werktuig vir spykers. Maar die wêreld bestaan uit meer as spykers.
6. Die Bybelse Siening van Ondersoek
Wat sê die Skrif self oor menslike ondersoek en ontdekking? Die antwoord mag verras, veral vir diegene wat dink dat die Bybel en intellektuele nuuskierigheid teenoor mekaar staan.
Spreuke 25:2 sê iets merkwaardigs:
Spreuke 25:2 – “Dit is die eer van God om ‘n saak te verberg, maar die eer van konings om ‘n saak na te speur.” (1953-vertaling)
Dink daaraan wat hierdie vers sê. God verberg dinge, nie om ons te frustreer nie, maar om ons te nooi om te soek. En die soektog self word beskryf as ‘n eersaak, ‘n koninklike aktiwiteit. Die mens wat die natuur ondersoek, wat die geheime van die skepping probeer ontrafel, doen iets koninkliks, iets wat by sy waardigheid as beelddraer van God pas.
In die antieke wêreld het baie kulture die natuur as heilig en onaanraakbaar beskou; om dit te ondersoek was godslastering. Die Bybelse tradisie stel dit anders: die natuur is geskep deur God, nie self God nie. Dit mag bestudeer word. Dit moet bestudeer word. Want in die bestudering daarvan ontdek ons die wysheid en krag van die Skepper.
Psalm 111:2 bevestig dit:
Psalm 111:2 – “Die werke van die HERE is groot; hulle word gesoek deur almal wat daarin vreugde vind.” (1953-vertaling)
Die Hebreeuse woord wat hier met “gesoek” vertaal word (darash) beteken om noukeurig te ondersoek, om diep te soek. Dit is dieselfde woord wat vir teologiese studie gebruik word. Die Psalmskrywer sê: die werke van God, sy skepping, is dit werd om noukeurig ondersoek te word. En die motivering is nie net nuuskierigheid nie. Dit is vreugde. Die gelowige wetenskaplike bestudeer die natuur omdat dit hom met verwondering en vreugde vul.
Dit is wetenskap as aanbidding.
Psalm 19:1-5 is miskien die klassieke teks oor die skepping as openbaring:
Psalm 19:1-5 – “Die hemele vertel die eer van God, en die uitspansel verkondig die werk van sy hande. Dag na dag laat dit woorde uitstroom, en nag na nag deel dit kennis mee. Daar is geen spraak en daar is geen woorde nie — hulle stem word nie gehoor nie. Tog gaan hulle meetsnoer oor die hele aarde uit, en hulle woorde tot by die einde van die wêreld.” (1953-vertaling)
Die skepping spreek, nie in hoorbare woorde nie, maar in ‘n taal van orde, skoonheid en wysheid wat deur die hele aarde eggo. Die wetenskaplike wat die natuur bestudeer, luister na hierdie taal. Hy mag dit nie so benoem nie, maar wanneer hy die elegansie van ‘n wiskundige wet bewonder of die ingewikkeldheid van ‘n biologiese stelsel ondersoek, ervaar hy iets van wat die Psalmskrywer beskryf.
Baie van die groot wetenskaplikes deur die geskiedenis het hierdie verwondering in hulle werk ervaar. Johannes Kepler, die man wat die wette van planetêre beweging ontdek het, het sy werk eksplisiet beskryf as “om God se gedagtes na Hom te dink.” Isaac Newton het die orde van die heelal beskou as bewys van ‘n intelligente Skepper. James Clerk Maxwell, wie se vergelykings elektrisiteit en magnetisme verenig het, het gebid dat sy werk tot God se eer sou strek. Michael Faraday, die grondlegger van die elektromagnetiese teorie, was ‘n diep gelowige man wie se oortuiging dat God se skepping ordelik en verstaanbaar is, hom gedryf het om die verborge wette van die natuur te ontdek. Hierdie mense was nie gelowiges ondanks hul wetenskap nie. Hulle was wetenskaplikes wie se geloof hulle juis aangedryf het om die skepping te ondersoek.
Romeine 1:19–20 beklemtoon dieselfde punt:
Romeine 1:19-20 – “Wat van God geken kan word, is immers aan hulle openbaar, want God het dit aan hulle geopenbaar. Want sy onsigbare eienskappe, naamlik sy ewige krag en goddelikheid, word van die skepping van die wêreld af uit sy werke duidelik gesien, sodat hulle geen verontskuldiging het nie.” (2020-vertaling)
Paulus sê nie dat die skepping die volledige openbaring van God is nie; daarvoor het ons die Skrif en die Gees nodig. Maar hy sê dat die skepping genoeg openbaar om die mensdom sonder verontskuldiging te laat. Die orde en skoonheid van die natuur wys na die Skepper.
Vanuit hierdie Bybelse raamwerk kan ons sê dat die wetenskaplike onderneming nie maar net ‘n neutrale, sekulêre aktiwiteit is nie. Dit is, in sy diepste wese, ‘n roeping, ‘n respons op God se uitnodiging om sy skepping te ondersoek en te geniet.
Dit beteken nie dat elke wetenskaplike ‘n gelowige is of moet wees nie. Baie uitstekende wetenskaplikes is nie gelowiges nie, en hulle wetenskaplike werk is nie daardeur minder geldig nie. Die punt is eerder dat die moontlikheid van wetenskap, die feit dat die natuur bestudeerbaar is, dat die menslike verstand in staat is om dit te begryp, dat daar orde is om te ontdek, die meeste sin maak binne ‘n teïstiese raamwerk.
Abraham Kuyper het dit so gestel in sy Stone Lectures (1898): die Calvinisme het die wetenskap bevry deur te leer dat die natuur geskep is (en dus bestudeerbaar), dat die menslike verstand na God se beeld gemaak is (en dus betroubaar), en dat alle lewensterreine onder God se heerskappy staan. Kuyper het geen twyfel gelaat nie: “There is not a square inch in the whole domain of our human existence over which Christ, who is Sovereign over all, does not cry: ‘Mine!’” Dit sluit die laboratorium in.
7. Praktiese Implikasies: Hoe om te Reageer
Hoe word hierdie insigte prakties? Hier is ‘n paar situasies wat gelowiges gereeld teëkom, met riglyne vir hoe om daaroor te dink.
“Ek glo net wat die wetenskap kan bewys.”
Hierdie stelling klink aanvanklik redelik. Maar vra jouself af: kan die wetenskap hierdie stelling self bewys? Is daar ‘n eksperiment wat kan aantoon dat slegs wetenskaplik-bewysbare dinge waar is? Nee. Hierdie stelling is ‘n filosofiese oortuiging, presies die soort ding wat dit sê jy nie kan glo nie.
Die vriendelikste antwoord is iets soos: “Ek het groot respek vir die wetenskap. Maar die stelling ‘slegs wetenskaplike kennis is geldig’ is self nie ‘n wetenskaplike bevinding nie. Dit is ‘n filosofiese posisie. So ons filosofeer al klaar saam. Die vraag is net: watter filosofie het die beste gronde?”
Hierdie benadering is nie aggressief nie. Dit erken die waarde van die wetenskap. Dit wys net vriendelik uit dat die ander persoon reeds ‘n filosofiese stap geneem het wat hy dalk nie besef het nie.
Jy kan ook vriendelik vra: “Glo jy dat ander mense werklik bewussyn het, of is dit net ‘n aanname?” Natuurlik sal hulle sê hulle glo dit. “Maar kan jy dit wetenskaplik bewys? Kan jy in ‘n laboratorium aantoon dat jou vrou of jou kind werklik ‘n innerlike lewe het?” Nee. Tog is dit een van die mees fundamentele dinge wat ons weet. Die punt is nie om verleentheid te veroorsaak nie, maar om te wys dat ons almal op meer as die wetenskaplike metode steun vir ons diepste oortuigings, en dit is heeltemal rasioneel om dit te doen.
“Wetenskap en godsdiens is in oorlog.”
Hierdie narratief, die sogenaamde konflik-tese, is een van die hardnekkigste mites in ons kultuur. In die volgende sessie ondersoek ons dit in detail histories en sal ons sien dat dit op ‘n misverstaan van die geskiedenis berus. Vir nou kan ons net sê: die oorgrote meerderheid van historici van die wetenskap het die konflik-tese reeds lank gelede verwerp. Die verhouding tussen geloof en wetenskap was altyd veel meer genuanseerd en vrugbaar as wat die populêre narratief voorgee.
As iemand hierdie punt maak, is ‘n goeie beginpunt om te vra: “Kan jy vir my ‘n spesifieke voorbeeld gee?” Gewoonlik sal hulle Galileo noem (ons sal dit in die volgende sessie in detail bespreek), en dit blyk byna altyd dat die werklike geskiedenis veel ingewikkelder is as die karikatuur.
“Daar is geen bewyse vir God nie.”
Hierdie stelling hang heeltemal af van wat jy met “bewyse” bedoel, en dit is ‘n filosofiese vraag, nie ‘n wetenskaplike een nie.
As jy met “bewyse” bedoel “empiriese, laboratoriumtoetsbare data,” dan is dit waar dat God nie daardie soort bewyse het nie, want God is nie ‘n fisiese objek wat in ‘n laboratorium ondersoek kan word nie. Maar dit is nie ‘n probleem vir die teïsme nie; dit is ‘n beperking van die metode. Die wetenskap kan nie swaartekrag in ‘n proefbuis sit nie; dit kan net die effekte van swaartekrag waarneem. Op dieselfde manier kan die teïs argumenteer dat ons die effekte van God se bestaan oral waarneem: in die bestaan van die heelal, in die rasionele orde van die natuur, in die werklikheid van bewussyn, in die morele orde, in die skoonheid van die skepping.
Die vraag is nie of daar bewyse is nie. Die vraag is watter soort bewyse toepaslik is vir watter soort werklikheid. Jy bewys nie liefde in ‘n laboratorium nie, maar dit beteken nie dat liefde onwerklik is nie. Jy toets nie wiskundige waarhede met ‘n mikroskoop nie, maar dit beteken nie dat wiskunde ongeldig is nie. Soos ons in Reeks 1 breedvoerig bespreek het, is die argumente vir God se bestaan filosofiese argumente, en hulle is kragtige, samehangende argumente wat deur die beste denkers van die laaste twee en ‘n half duisend jaar ontwikkel en verfyn is.
Die gereformeerde tradisie voeg hier iets belangriks by. Calvyn het geleer dat die probleem nie ‘n gebrek aan bewyse is nie; die skepping roep dit uit, soos Psalm 19 sê. Die probleem is dat die gevalle mens hierdie bewyse onderdruk (Rom. 1:18). Die sensus divinitatis, die ingeboude bewussyn van God, word deur die sondeval verduister. Daarom is die werk van die Heilige Gees nodig om ons oë te open vir wat regtig voor ons lê. Die bewyse is daar; dit is ons waarneming wat gebrekkig is.
Bavinck het hierdie punt met groot helderheid uitgewerk. Hy het betoog dat alle mense ‘n aangebore kennis van God het, nie ‘n volledige dogmatiese kennis nie, maar ‘n diep, onuitwisbare bewussyn dat daar ‘n transendente Werklikheid is. Hierdie kennis word egter deur die sonde vertroebel en onderdruk. Die natuurmens sien die bewyse, maar verwerp die gevolgtrekking. Hy bewonder die orde van die natuur, maar ontken die Ordenaar. Soos Paulus dit in Romeine 1:21 stel: “Hoewel hulle God geken het, het hulle Hom nie as God verheerlik of gedank nie, maar het hulle in hul oorleggings verydel geraak, en hul onverstandige hart is verduister.”
Ons as gelowiges staan nie in ‘n posisie van swakheid wanneer ons in gesprek is oor die bewyse vir God nie. Die bewyse is oorweldigend: in die bestaan van die heelal, in sy rasionele orde, in die werklikheid van bewussyn, in die morele dimensie van die menslike ervaring. Die uitdaging is nie ‘n gebrek aan bewyse nie, maar ‘n weerstand teen die gevolgtrekking waarheen die bewyse lei.
In elkeen van hierdie gevalle is die grondbeginsel dieselfde: onderskei versigtig tussen wetenskap (die metode) en sciëntisme (die filosofie). Die wetenskap is ons vriend. Sciëntisme is ‘n oorhaastige filosofiese aanname wat homself nie kan regverdig nie.
Ons hoef nie bang te wees vir wetenskaplike ontdekkings nie. Elke ware ontdekking is ‘n ontdekking van God se handewerk. Wat ons moet afwys, is nie die wetenskap nie, maar die filosofiese oordrewe interpretasie van die wetenskap wat beweer dat dit die enigste pad na waarheid is.
8. Opsomming en Vooruitblik
Die wetenskaplike metode is ‘n kragtige, gedissiplineerde manier om die natuurlike wêreld te bestudeer. Dit werk deur empiriese waarneming, hipotesevorming, toetsing en hersiening. Sy krag lê in sy fokus en sy selfkorreksie.
Die filosofie van die wetenskap, van Popper tot Kuhn tot Polanyi tot Lakatos, wys ons dat die wetenskap ‘n menslike onderneming is: kragtig, maar nie onfeilbaar nie; progressief, maar nie reguitlyn nie; rasioneel, maar nie los van tradisie, oordeel en vertroue nie.
Sciëntisme, die filosofiese aanspraak dat wetenskap die enigste pad na kennis is, is selfondermynend. Dit maak ‘n filosofiese aanspraak wat sy eie geldigheid ontken. Dit is nie wetenskap nie; dit is slegte filosofie.
Die voorveronderstellings van die wetenskap is metafisiese aannames wat die beste verklaar word deur klassieke teïsme. Die God wat die Logos is, die Rede agter die werklikheid, is die grond waarop die wetenskap staan, selfs wanneer dit nie daarvan bewus is nie.
Die grense van die wetenskap is werklik, maar dit is nie mislukkings nie. Die vrae oor bestaan, bewussyn, moraliteit, betekenis en orde val buite die empiriese domein. Om hierdie vrae te antwoord, het ons filosofie, teologie en wysheid nodig, nie as vervanging vir die wetenskap nie, maar as noodsaaklike aanvullings. Soos die gereformeerde teoloog Cornelius Van Til dikwels beklemtoon het: alle feite is God se feite, en alle ware kennis is uiteindelik kennis wat in verhouding staan tot God se selfkennis. Die wetenskap ontdek nie “neutrale” feite nie; dit ontdek God se werke, of die wetenskaplike dit besef of nie.
Die Skrif moedig ondersoek aan. Die skepping is God se werk, en om dit te bestudeer is ‘n koninklike eer. Wetenskap, reg verstaan, is ‘n daad van verwondering. En verwondering is die begin van aanbidding.
Volgende Sessie
Die volgende sessie duik in die geskiedenis van wetenskap en geloof. Ons ondersoek die bewering dat wetenskap en godsdiens altyd in oorlog was, die sogenaamde “konflik-tese.” Hierdie narratief is histories onhoudbaar, en die werklike geskiedenis vertel ‘n veel ryker en verrassender verhaal. Van die Middeleeuse kerklike universiteite wat die moderne wetenskap moontlik gemaak het, tot die diep gelowige wetenskaplikes soos Kepler, Newton en Faraday: die verhouding tussen geloof en wetenskap is ‘n verhaal wat die moeite werd is om reg te ken.
Tot dan.
What Is Science Really?
Introduction: “Science Says…”
There are few phrases in our culture that carry as much authority as these three words: “Science says.” It is the trump card in almost every conversation — about health, about politics, about the origin of the universe, about whether God exists. Someone need only say “science says” and the debate is over. Who is going to argue against science?
But here is the irony: most people who use this phrase have never really thought about what science is and what it is not. They use “science” like a talisman, a magic word that automatically answers all questions and removes all doubt. In reality, science is a beautiful but limited instrument. To use it correctly, you first need to understand what it can do and what falls beyond its reach.
Think about it: if you ask someone “What is science?”, most people will say something like “it is when scientists do research” or “it is what happens in laboratories.” But that is like saying music is “when people play instruments.” Technically true, but it misses the deeper point entirely.
What is science really? Its method, its history, its power and its limits. Not to tear science down. On the contrary. To respect science for what it truly is, rather than deifying it into something it was never meant to be. Because when we inflate science into an omniscient authority, we are no longer doing science. We are doing philosophy. And usually bad philosophy.
This series, Science & Reality, builds on Series 1, where we laid the metaphysical foundation: God as the infinite Ground of all being, the Logos behind reality. Now we ask: how does science relate to that foundation? Has science made God redundant, or does it discover precisely the order and beauty that the Creator has woven into his creation?
1. The Scientific Method: What Science Actually Does
Science is, at its core, a method. A disciplined way of acquiring knowledge about the natural world. Not a body of eternal truths engraved on stone tablets, but a process of asking and answering, of testing and revising. That process has a specific structure:
Observation. Everything begins with the attentive eye. A scientist notices something in nature that catches his attention. Apples fall to the ground, not upwards. Certain plants grow better in the shade. Light bends when it passes through water. Science begins with empirical observation: the careful, systematic study of what we can see, measure and weigh in the physical world.
Hypothesis. On the basis of observation, the scientist forms an explanation — a hypothesis. Perhaps apples fall because there is a force that pulls objects towards the earth. Perhaps those plants grow better in the shade because they need less light for photosynthesis. The hypothesis is a provisional answer that still needs to be tested.
Testing. This is where the experiment comes in. The scientist designs a way to test his hypothesis — to see whether the prediction holds. If the hypothesis is true, then X should happen under conditions Y. The test must be repeatable: other scientists must be able to replicate it and obtain the same results. This is one of the great strengths of the scientific method. It does not depend on one person’s word. It is a communal enterprise.
Rejection or Confirmation. If the experiment contradicts the hypothesis, it is rejected or adjusted. If it supports the hypothesis, the hypothesis is strengthened — but never absolutely proven. Science works through provisional confirmation, not through final proofs. Even the strongest theory remains open to revision if new data contradicts it. Newton’s laws of gravity appeared untouchable for more than two centuries, until Einstein showed that they were a special case of a deeper reality.
Peer review. Scientific results are submitted to the broader community for assessment. Other experts try to find errors, offer alternative explanations, replicate the work. This process is not perfect. It is influenced by social pressure, funding, fashions and personalities. But it is an essential mechanism of self-correction.
The beauty of the scientific method lies in its combination of boldness and humility. Boldness, because the scientist dares to say: “I think I know how this works.” Humility, because he always adds: “But I may be wrong, and I invite you to test me.”
This method has borne fruit that has transformed our lives. We understand the structure of atoms, the workings of the immune system, the age of stars. The scientific method has led to medicines that save millions of lives, technology that has reshaped the human experience, and a deeper appreciation of the complexity and beauty of nature.
No one need be against science. The question is not whether science has value. It has tremendous value. The question is whether science is the only way to acquire truth.
But note: the scientific method is designed to study the natural, physical, measurable world. It works with what is empirically accessible: matter, energy, space, time. It measures what is repeatable, tests what is experimentable, and observes what is observable through the senses or instruments.
This means that the scientific method, by its very nature, is not equipped to answer questions that fall outside the empirical domain. It cannot pronounce on God, on morality, on the meaning of life, on love as more than chemical reactions, on the nature of consciousness, or on why there is something rather than nothing at all.
This is not a failure of science. It is a feature of science — just as the fact that a telescope cannot hear music is not a failure of the telescope. It simply is not what it was designed for. Science’s power is also its limitation: it focuses on the measurable, and thereby necessarily misses everything that is not measurable.
Peter Medawar, the Nobel Prize winner for medicine, put it clearly in his book The Limits of Science (1984):
“The existence of a limit to science is, however, made clear by its inability to answer childlike elementary questions having to do with first and last things — questions such as ‘How did everything begin?’ ‘What are we all here for?’ ‘What is the point of living?’”
Medawar was not a theologian. He was one of the twentieth century’s leading scientists. But he understood that the power of science lies precisely in its limitedness. By acknowledging what it cannot do, we also protect what it can do.
2. The Philosophy of Science: How Scientists Really Think
Most people think science is a simple, straight-line process: you do an experiment, get an answer, and move on. But the history and philosophy of science reveal a more complex picture. In the twentieth century, a series of thinkers researched how science actually functions, and their findings are surprising.
Karl Popper: Falsifiability and the Limits of Proof
The Austrian-British philosopher Karl Popper (1902–1994) is often regarded as the most important philosopher of science of the twentieth century. His core insight was simple: science advances not by proving things, but by refuting them.
Popper called this the principle of falsification. A statement is scientific if it is in principle refutable — if there is a possible observation that could prove it wrong. If someone says “all swans are white,” that is scientific, because you can in principle find a black swan. (And indeed, when European explorers found black swans in Australia, the statement was refuted.) But if someone says “there are invisible elves in my garden who withdraw themselves from any possible observation,” then that is not scientific. Not because it is necessarily untrue, but because no possible observation could refute it.
Popper developed this principle partly in response to two influential schools of thought of his time: Marxism and Freudianism. He noticed that adherents of these systems could explain any possible observation within their framework. If a Marxist prediction did not come true, the theory was not adjusted; the data was reinterpreted. If a patient accepted a Freudian interpretation, it proved the interpretation; if he rejected it, that was “resistance,” which also proved it. Such systems were, according to Popper, irrefutable — and precisely for that reason not scientific. He contrasted this with Einstein’s theory of relativity, which made specific, testable predictions that could in principle be wrong. When Arthur Eddington measured the bending of light during a solar eclipse in 1919, the observation confirmed the theory. But the point was that it also could have refuted the theory. That was the mark of true science.
This principle has far-reaching implications.
A theory that has survived a thousand tests is strongly confirmed, but it is not proven. The thousand-and-first test may still refute it. That is why scientists speak of “theories” rather than “truths” — not because they are uncertain about everything, but because the scientific method acknowledges that all knowledge is provisional.
Then there is the asymmetry of proof and refutation. You can never prove that all swans are white (because you have not examined all swans), but you can prove with one black swan that not all swans are white. Science advances by eliminating hypotheses, not by establishing them forever. Popper wrote that we never reach certainty; we simply become ever better at identifying our mistakes.
And then the point that is often missed: what is not falsifiable is not scientific, but it is not necessarily nonsense. Popper’s principle is a demarcation criterion that distinguishes science from non-science. But it does not say that everything that is non-science is worthless. Ethics, aesthetics, metaphysics, theology: these disciplines fall outside the scientific method, but that does not mean they are without value or truth. They simply yield a different type of knowledge from empirical science.
Popper’s work shows that science itself acknowledges that it cannot prove everything, and that the boundaries of science are not the boundaries of reality.
Thomas Kuhn: Paradigm Shifts and the Human Side of Science
If Popper showed us how science ought to work, Thomas Kuhn (1922–1996) showed us how it actually works. In his book The Structure of Scientific Revolutions (1962), Kuhn traced the history of science and found something surprising: science does not progress in a smooth, cumulative line. It moves in sudden leaps.
Kuhn introduced the concept of the paradigm. A paradigm is the prevailing framework within which scientists work at any given time. Not just a theory, but an entire way of seeing: a set of assumptions, methods, and questions considered important.
Most of the time, Kuhn says, scientists do what he calls “normal science.” They work within the paradigm, solve problems defined by the paradigm, apply the framework to new cases. Like solving puzzles within the rules of a particular game.
But sometimes anomalies begin to accumulate — observations that do not fit within the paradigm. Initially they are ignored or explained away. Over time they become too many and too serious. Then a crisis erupts, and eventually a paradigm shift occurs: the old framework is discarded and a new one takes its place.
Think of the history: the Ptolemaic model placed the earth at the centre of the universe, with the sun, moon and planets orbiting it in circles. For more than a thousand years it worked — reasonably well, with certain adjustments (such as the famous epicycles, small circles on top of large circles, to explain the observed motions of the planets). But anomalies accumulated. Copernicus, Kepler and Galileo proposed a new paradigm: the sun is at the centre, and the earth orbits it. This was not just a minor adjustment. It was a total change of perspective.
A more recent example: at the end of the nineteenth century, Newtonian physics was considered nearly complete. Lord Kelvin is reported to have said that there were only two small clouds on the horizon of physics. Those two “clouds” exploded into the two greatest revolutions of twentieth-century physics: quantum mechanics and Einstein’s theory of relativity. The entire framework within which physicists had thought was overturned: the absolute character of time and space, the predictability of particles, the nature of light. Not because the old physics was “wrong” (Newton’s laws still work excellently for everyday applications), but because a deeper reality had become visible that required a larger framework.
Kuhn’s work yields several important insights for us.
Science is not a purely rational process. Paradigm shifts are not driven by data alone, but also by social, cultural and psychological factors. Scientists are human. They have loyalties, emotions, reputations to protect, and they tend to defend the paradigm within which they were trained. Max Planck, himself a great physicist, drily remarked: “A new scientific truth does not triumph by convincing its opponents… but rather because its opponents eventually die, and a new generation grows up that is familiar with it.”
There is also no “God’s-eye view” in science. Scientists always look through the lens of a paradigm. They see reality through a framework, and that framework largely determines what they see and do not see. This does not mean that science is arbitrary or unreliable. It means that it is human, with all the power and limitations that entails.
And scientific “progress” is complex. After a paradigm shift, the new paradigm is not necessarily “better” in every respect than the old one. It solves different problems, asks different questions, sees the world in a different way. Kuhn was careful about saying that science necessarily moves closer to the “truth.” Rather, he said, it becomes more effective in problem-solving.
Michael Polanyi: Tacit Knowledge and Personal Involvement
The Hungarian-British scientist and philosopher Michael Polanyi (1891–1976) illuminated another dimension of science. In his major work Personal Knowledge (1958), he argued that all knowledge, including scientific knowledge, has a personal and tacit component.
What does this mean? Polanyi observed that a scientist knows more than he can write down in formulas and data. A good experimenter has a feel for when an experiment is going right, an intuition about which hypotheses are worth pursuing. This knowledge is not learned from textbooks. It is built up through years of training, mentorship and practical experience. Like the ability to ride a bicycle: you cannot fully explain it in words, but you know it.
Polanyi called this “tacit knowledge.” He argued that this tacit dimension is not an incidental accessory of science, but the foundation on which all formal scientific knowledge rests.
The consequences of this are far-reaching.
Science is not a cool, detached process. It is a deeply personal enterprise that requires trust, commitment and judgement. A scientist chooses to investigate a particular problem, he trusts his mentors and the tradition within which he works, and he makes judgements that cannot be fully determined by rules or algorithms.
Science also rests on a tradition. Just as a craftsman learns his skills within a master-apprentice relationship, scientists are trained within a tradition. They learn not just facts and formulas; they learn a way of thinking, of seeing, of judging. This tradition is not automatically transmitted. It requires personal involvement and trust.
And the objectivity of science is not absolute. This does not mean that science is subjective in the sense of arbitrary. But the idea of a purely objective, value-free science is a myth. Every scientist brings his person, his convictions and his judgement to the table. The best science is not that which denies this human dimension, but that which acknowledges it and deals with it responsibly.
For us as believers, Polanyi’s work is particularly insightful. The trust and commitment that operate in science are not so different from the trust and commitment that operate in faith. The scientist believes that nature is orderly and comprehensible. He trusts that his senses and his reason are reliable. He commits himself to a tradition and a community. These “acts of faith” are not irrational. They are the necessary conditions for any acquisition of knowledge.
Polanyi also showed that there is a hierarchy of knowledge domains that cannot be reduced to one another. The laws of physics do not explain biology, even though biology is built upon physics. The laws of biology do not explain consciousness, even though consciousness is connected to biological processes. Each higher level has its own principles that cannot simply be derived from the lower level. The claim that “everything is ultimately physics” ignores the way in which reality exists in layers, each requiring its own explanations.
Imre Lakatos: Research Programmes and Scientific Rationality
The Hungarian philosopher Imre Lakatos (1922–1974) tried to find a middle way between Popper’s rationalism and Kuhn’s sociological approach. His model of research programmes offers a nuanced view of how scientists actually make decisions about what to believe and what to reject.
According to Lakatos, a research programme consists of a hard core of central assumptions that are not negotiable, and a protective belt of auxiliary hypotheses that can be adjusted when problems arise. Scientists do not defend individual hypotheses; they defend entire programmes.
A research programme is progressive if it predicts new facts and makes new discoveries possible. It is degenerating if it merely reacts to problems by making ad hoc adjustments without discovering anything new. Over time, progressive programmes replace the degenerating ones.
The significance of Lakatos’s model for our discussion is this: even the choice of which research programme to follow is not a purely mechanical process. It requires judgement, patience, and sometimes even faith that a programme currently experiencing problems will ultimately succeed. Scientists must sometimes go against the prevailing opinion, sometimes against the data as it currently appears, because they trust that their programme’s hard core will ultimately bear fruit.
Does that not sound strangely familiar? The structure of a research programme, with its non-negotiable core and its flexible periphery, is not entirely unlike how believers think about their confession. There are core truths that stand firm (the “hard core”), and there are applications and interpretations that develop with new insights (the “protective belt”).
The philosophy of science — from Popper to Kuhn to Polanyi to Lakatos — shows us a consistent picture: science is a human enterprise. Powerful, reliable in its domain, self-correcting over time. But not the cool, impersonal machine that popular culture makes of it. It rests on assumptions, requires judgement, is influenced by tradition and community, and has inherent limits.
This does not mean that science is unreliable. It means that we should value it for what it is rather than deifying it into something it is not.
3. Scientism versus Science: The Essential Distinction
Here we come to one of the most important distinctions in this entire series: the distinction between science and scientism. The confusion between these two is responsible for much unnecessary conflict and misunderstanding.
Science is a method for studying the natural world through empirical observation, hypothesis formation, testing and revision. It is a beautiful, powerful instrument.
Scientism is the philosophical claim that the scientific method is the only valid way to acquire knowledge — that only what can be scientifically proven is true or meaningful.
The difference is fundamental. Science is a method; scientism is a metaphysics. Science studies nature; scientism claims that nature is all there is. Science says: “This is what we can observe and measure.” Scientism says: “If you cannot observe and measure it, it does not exist.”
The Self-Defeating Nature of Scientism
Here is the core problem with scientism: it undermines itself.
The statement “Only scientific claims are valid” is itself not a scientific claim. No experiment can prove it. No laboratory can test it. No empirical observation can confirm it. It is a philosophical statement — precisely the kind of statement that scientism declares invalid.
In other words: scientism uses philosophy to deny philosophy. It stands on the ladder of metaphysics to kick the ladder out from under itself. It is like saying “There is no language other than English” — in English. The statement does not contradict itself on the surface, but the moment you think about it, you realise it is logically inconsistent.
Ludwig Wittgenstein, one of the twentieth century’s most influential philosophers, used a striking metaphor applicable here. In his Tractatus Logico-Philosophicus (1921) he writes that the propositions of his book are like a ladder: someone who climbs it must ultimately acknowledge that the ladder itself must be transcended. The framework we use to delineate the boundaries of language and knowledge does not itself fall within those boundaries. The scientistic thinker uses precisely such a “ladder”: he uses philosophy to claim that philosophy is unnecessary, and then must kick away the ladder and hope he does not fall.
Sir Peter Medawar put it with characteristic clarity:
“There is no quicker way for a scientist to bring discredit upon himself and upon his profession than roundly to declare — particularly when no declaration of any kind is called for — that science knows, or soon will know, the answers to all questions worth asking.”
Medawar did not mean that scientists are foolish. He meant that a scientist who claims his method is the only path to truth is no longer speaking as a scientist. He is philosophising. And usually without realising it.
The History of Scientism
Where does scientism come from? Not from science itself. Many founders of modern science, such as Galileo, Newton, Boyle and Faraday, were deeply believing people who would never have claimed that science is the only source of knowledge. Scientism has its roots rather in the Enlightenment philosophy of the eighteenth and nineteenth centuries, and in the positivism of Auguste Comte, who taught that humanity passes through three stages of development: the theological, the metaphysical and the positivistic (scientific). In Comte’s system, science would eventually replace all other forms of thought.
This vision has had great influence, but it is itself not scientific. It is a philosophical narrative about the history and destiny of humanity. Ironically, positivism was itself largely rejected by twentieth-century philosophy. The logical positivists of the Vienna Circle tried to reduce all meaningful statements to empirically verifiable statements, and discovered that this principle could not survive itself. The verification principle (“only verifiable statements are meaningful”) is itself not verifiable. Positivism signed its own death warrant.
Yet scientism lives on in popular culture, especially in the works of the so-called “New Atheists” such as Richard Dawkins, Sam Harris and the late Christopher Hitchens. These writers are competent in their own fields, but when they claim that science is the only reliable path to knowledge, they leave science and enter philosophy. Usually without realising it, and without the discipline that good philosophy requires.
How Do You Recognise Scientism?
Scientism does not always come in an obvious form. It often hides in seemingly reasonable statements:
- “I only believe what can be proven.” (But can you prove that only provable things are true?)
- “If science cannot find it, it does not exist.” (That is like saying: “If my metal detector does not pick it up, there is no wood in the forest.”)
- “Everything is ultimately explicable by physics.” (That is a creed, a metaphysical assumption, not a scientific finding.)
- “We will one day be able to explain everything scientifically.” (One day is not science. It is hope. And while there is nothing wrong with hope, we must not confuse it with empirical proof.)
The point is not that these people are malicious. Many people who embrace scientism are sincere and intelligent. They simply have not realised that they are taking a philosophical position. They think they are “just following the science.”
Alvin Plantinga’s Observation
The Reformed philosopher Alvin Plantinga made an astute point in his book Where the Conflict Really Lies (2011): the real conflict of our time is not between science and faith. It is between scientism and faith. Science, properly understood, is an ally of faith, not an enemy. But scientism — the philosophical claim that nothing exists beyond the natural world — is a rival belief system. And it is a belief system that is not even aware that it is one.
This distinction is liberating. A believer does not have to choose between science and faith. You can fully embrace science as a powerful instrument for studying God’s creation, and at the same time reject the philosophically excessive claims of scientism. This is not anti-science. It is pro-science and pro-honesty about the limits of the scientific method.
4. The Presuppositions of Science
Here we come to what may be the deepest point of this session — the point that connects directly with everything we discussed in Series 1.
Science works. It delivers results. It makes predictions that hold true. But why does it work? Most scientists do not think about this; they are too busy doing science. But when we do reflect on it, we discover something remarkable: science rests on a series of presuppositions — assumptions that it cannot prove itself.
1. The external world exists and is real.
This sounds so self-evident that it hardly seems worth mentioning. But think about it: science accepts that there is a real world “out there,” independent of our observation. This is not something science can prove, because every proof would already accept that the world is real. It is a metaphysical assumption — a philosophical conviction that precedes science.
Philosophers through the centuries have wrestled with the question of whether the external world is real. From Descartes’s cogito ergo sum to Berkeley’s idealism to the brain-in-a-vat thought experiment: the point is not that the world is unreal, but that the conviction that it is real cannot itself be scientifically proven. It is a starting point, not a conclusion.
2. The universe is rationally ordered and follows consistent laws.
Science accepts that nature is patterned — that the same causes under the same circumstances will have the same effects. Without this assumption, science is impossible. If nature were arbitrary — if gravity pulled today and pushed tomorrow, if water sometimes flowed upward and other times downward — no experiment would make any sense.
But why is nature like this? Why does the universe obey mathematical laws? Why is there order rather than chaos? These questions science cannot answer, because science already accepts order as its starting point. As Einstein observed:
“The eternal mystery of the world is its comprehensibility… The fact that it is comprehensible is a miracle.”
Einstein did not use the word “miracle” in a technically theological sense, but his point was profound: the fact that the universe is comprehensible is itself something that requires explanation. And that explanation cannot come from science alone.
3. Our minds can reliably observe and reason about this order.
Science accepts not only that the world is orderly. It also accepts that our minds are equipped to grasp that order. Our logic, our mathematics, our reasoning abilities: science trusts that these faculties are reliable, that they lead us to true insights about reality.
But why would that be so? If our minds are merely the products of a blind, purposeless evolutionary process — if there is no rational ground behind reality — why would we expect our thinking to reliably reflect reality? The theory of evolution (in the naturalistic sense) says that our brain developed to help us survive, not to discover truth. A being that maintains certain illusions may survive just as well as one that accurately perceives reality.
This is precisely the point Alvin Plantinga makes in his famous Evolutionary Argument Against Naturalism (EAAN): if naturalism is true and our cognitive faculties are merely the product of unguided evolution, we have no good reason to trust that our beliefs are true — including the belief that naturalism itself is true. Naturalism undermines the reliability of the very reason we need to evaluate naturalism. It is a deep irony.
4. Mathematics describes physical reality.
The natural sciences, and especially physics, make extensive use of mathematics. Natural laws are expressed in mathematical equations. And it works: the mathematical models predict reality with astonishing accuracy.
But why? Mathematics is on the face of it an abstract, mental activity. It deals with numbers, shapes and structures that do not physically exist. Why would an abstract creation of the human mind describe the physical universe so accurately? The physicist Eugene Wigner spoke in a famous article about “the unreasonable effectiveness of mathematics in the natural sciences” — the unreasonable effectiveness of mathematics. He had no explanation for it. From a naturalistic framework it is a puzzle. From a theistic framework it makes perfect sense: a rational God created a mathematically structured universe and made rational beings capable of discovering that structure.
5. The uniformity of nature (the future will resemble the past).
Science accepts that the laws of nature hold always and everywhere — that the laws that hold today will also hold tomorrow, and also in far-off galaxies. Without this assumption, no scientific prediction can be made. But the philosopher David Hume already showed in the eighteenth century that this assumption cannot be logically proven. The fact that the sun has risen every day until now does not prove that it will rise tomorrow. It gives us only a strong habit of expectation.
This is known as the problem of induction: the leap from “this has happened so far” to “this will always happen” is logically not guaranteed. Science accepts induction, but cannot prove it. Yet another presupposition. Yet another act of faith.
And here is the point that brings everything together — the point that takes us back to Series 1 and the heart of this discussion.
Each of these presuppositions is a metaphysical assumption: the reality of the world, the rational order of nature, the reliability of the mind, the applicability of mathematics, the uniformity of nature. Not one of them can be proven by science itself. Science rests on them; it does not prove them.
But here is the remarkable thing: each of these assumptions is precisely what a classical theistic worldview would predict.
If there is a rational God who created the universe, then we would expect that:
- the world is real and substantial (it is God’s creation, not an illusion);
- nature is orderly and law-governed (it reflects the rational nature of the Creator);
- our minds are able to comprehend nature (we are made in the image of the Rational God, the imago Dei);
- mathematics describes nature (both the mathematical structure of the universe and our mathematical ability come from the same Source);
- nature is consistent (God is faithful and sustains his creation).
In other words: the presuppositions on which science rests are best explained by classical theism. Science, without realising it, operates within a framework that makes the most sense if God exists.
This is not a “God of the gaps” argument. We are not saying “we cannot explain this, therefore God.” It is precisely the opposite. Science works, and the question is why it works. The answer does not lie in a gap in our knowledge, but in the foundation of all knowledge. It is like asking why the floor can bear your weight. The answer is not a gap in the floor; it is the foundation beneath the floor.
Herman Bavinck, the great Reformed theologian, wrote extensively in his Reformed Dogmatics about the relationship between God’s general revelation and human knowledge. God reveals Himself not only in Scripture, but also in creation — in the order, the beauty, the lawfulness of nature. Science, when it studies nature, is in reality studying God’s works. Bavinck argued that the possibility of all true knowledge rests on the fact that God created the human mind to stand in relation to his creation — that there is a correspondence between our thinking and reality, because both find their origin in the same God.
Abraham Kuyper illuminated this from a different angle with his principle of sphere sovereignty. Kuyper taught that each sphere of life (science, art, church, state, family) has its own domain established by God. Science has its own sphere and its own laws. It is not the task of the church to prescribe to science what it must find, and it is not the task of science to declare theology redundant. Each sphere has its own authority and its own limitations, and all stand under the sovereignty of God.
This principle is liberating in two directions. On the one hand, it frees science from ecclesiastical domination: the scientist may follow his research wherever it leads, without the church constraining him. On the other hand, it frees theology from scientific imperialism: science does not have the right to declare that it is the only valid source of knowledge, because that would exceed its own sphere. Kuyper’s framework gives each its place without annexing the other’s territory.
We can embrace science without surrendering our faith, and confess our faith without rejecting science. The two are not in competition. They operate in different spheres, under the same God.
This is, as we discussed in Series 1, the Logos — the Divine Reason that structures reality. John 1:1–3 says: “In the beginning was the Word, and the Word was with God, and the Word was God. All things were made through him, and without him was not any thing made that was made.” (ESV) The Logos is not merely a religious idea. It is the ground of the rational structure of reality that science studies. When a physicist discovers a mathematical law that describes nature, he discovers an expression of the Logos. When a biologist investigates the complexity of the cell, he is looking at the handiwork of the Logos.
Science, properly understood, is not a threat to faith. It is, at a deep level, an expression of it.
5. What Science Cannot Answer
Science is a powerful instrument within its domain. But what lies outside that domain? Which questions are fundamentally beyond the reach of the scientific method? This is not a rhetorical question. It is a concretely philosophical one, and it has directly to do with the questions that trouble people most in life.
Why is there something rather than nothing?
This question, which Leibniz called the ultimate question and which we discussed extensively in Series 1, falls entirely outside the reach of science. Science can study the structure of what exists, but not the fact that it exists. Physics can explain how matter and energy interact, but not why there is matter and energy to interact with.
Even if a physicist were to claim that the universe arose from “nothing” (as some cosmological models suggest), that “nothing” is not really nothing. It is a quantum vacuum with mathematical properties and physical potential. It is a something. The question “Why is there anything at all?” remains.
What is consciousness?
The so-called hard problem of consciousness, as the philosopher David Chalmers called it, is one of the deepest puzzles of our time. We know that brain activity accompanies conscious experience. But why? Why is there a subjective “what it feels like” when certain neurons fire? Why is the brain not simply a dark, unconscious machine that processes information without any inner experience?
Neuroscience can identify correlations: “this brain area is active when you experience pain.” But it does not explain why there is a subjective experience of pain. This is not a gap in our current knowledge; it is a fundamental limit of the physically empirical approach. We will discuss this theme in depth in Session 6 of this series.
What is morally right?
Science can describe what people do: their behaviour, their tendencies, the evolutionary origins of moral intuitions. But it cannot say what people ought to do. The leap from “is” to “ought” — which the philosopher David Hume called the is-ought gap — is not a scientific leap. It is a philosophical and moral one.
Neuroscience can show that people have an emotional reaction when they see injustice. But it cannot say that injustice is wrong — only that people feel it as wrong. If morality is nothing more than brain currents, then the statement “it is wrong to abuse children” has no more authority than “I dislike spinach.” Most people intuitively realise that this is absurd — that morality is more than personal preference. But that “more” falls outside the domain of science.
What is the meaning of life?
Why are we here? What do we live for? Does life have a purpose? These questions are universal and deeply human, but they are not scientific questions. Biology can explain how life originated and how it functions. It cannot say what it is for.
The physicist Steven Weinberg wrote: “The more the universe seems comprehensible, the more it also seems pointless.” But note: Weinberg did not say that science has proven that the universe is pointless. He said it seems so from a purely scientific perspective. Of course it seems so. Science is not designed to find meaning; it is designed to find mechanisms. To say that the universe “seems pointless” from a scientific perspective is like saying that a sunset “seems colourless” when you view it through a black-and-white camera. The limitation lies in the instrument, not in the reality.
Think about how absurd it would be if a chemist were to say: “I have analysed Rembrandt’s Night Watch. It consists of paint, pigments, oils, binders on canvas. There is no meaning to be found in this material. Therefore the painting has no meaning.” The analysis is correct. The painting is material. But the conclusion is absurd. The meaning of the painting is real, but it falls on a different level than what chemistry can measure. Just so, the meaning of life is real, but it falls on a level that physics and biology cannot reach.
The Preacher knew long ago that life, without a transcendent frame of reference, looks “vanity.” “Vanity of vanities,” the book of Ecclesiastes begins (1:2, ESV). But the Preacher’s conclusion is not nihilism. It is that life without God is empty, and that the fear of the Lord and the keeping of his commandments is “the whole duty of man” (Eccl. 12:13, ESV). The emptiness that the naturalist experiences is not proof that there is no meaning. It is a symptom of a worldview that is too small for reality.
Why is the universe rationally ordered?
This is perhaps the deepest question of all. Science discovers order in nature. But why is there order? Why does the universe obey mathematical laws? Why is reality comprehensible?
This question cannot be answered from within science, because science accepts order as its starting point. To say “the laws of nature explain the order” is circular. It is like saying “the rules of the game explain why there is a game.” The rules describe the order; they do not explain it.
The mathematician and physicist Roger Penrose calculated that the initial state of the universe had to be so precise that the chance of obtaining it by accident is 1 in 10^(10^123) — a number so large that it exceeds all existing atoms in the universe. Science can describe this precision, but it cannot explain why the universe is so finely tuned. It can say how the laws work, but not why there are such laws. And that is precisely where philosophy and theology become indispensable.
If the universe is the product of a Rational God — the Logos of John 1 — then the rational order of nature is not an inexplicable stroke of luck. It is the expression of the Creator’s nature. The order is there because the Orderer is there. The lawfulness of nature reflects the faithfulness of the God who sustains it. As Jeremiah 33:25–26 puts it: “If I have not established my covenant with day and night and the fixed order of heaven and earth…” (ESV) God Himself links His faithfulness to his creation to the consistency of the natural laws.
These questions are not “problems” that science has simply not yet solved. They are not “gaps” that some future discovery will fill. They fall fundamentally outside the scientific domain — just as the question “What colour is the note C?” falls outside the domain of music. The question is not nonsense. It is simply the wrong kind of question for that particular discipline.
A scientist who says “science cannot answer that, therefore the question is meaningless” has made a philosophical error. He has confused the limits of his instrument with the limits of reality. It is like a man who has only a hammer and then claims that everything is a nail. The hammer is an excellent tool for nails. But the world consists of more than nails.
6. The Biblical View of Inquiry
What does Scripture itself say about human inquiry and discovery? The answer may surprise — especially those who think that the Bible and intellectual curiosity stand opposed to each other.
Proverbs 25:2 says something remarkable:
Proverbs 25:2 — “It is the glory of God to conceal things, but the glory of kings is to search things out.” (ESV)
Think about what this verse says. God conceals things — not to frustrate us, but to invite us to seek. And the search itself is described as a matter of honour, a kingly activity. The person who investigates nature, who tries to unravel the secrets of creation, is doing something royal — something befitting his dignity as a bearer of God’s image.
In the ancient world, many cultures regarded nature as sacred and untouchable; to investigate it was blasphemy. The biblical tradition puts it differently: nature is created by God — it is not itself God. It may be studied. It should be studied. Because in studying it we discover the wisdom and power of the Creator.
Psalm 111:2 confirms this:
Psalm 111:2 — “Great are the works of the LORD, studied by all who delight in them.” (ESV)
The Hebrew word translated “studied” here (darash) means to inquire diligently, to seek deeply. It is the same word used for theological study. The Psalmist says: the works of God — his creation — are worthy of careful investigation. And the motivation is not mere curiosity. It is delight. The believing scientist studies nature because it fills him with wonder and joy.
This is science as worship.
Psalm 19:1–4 is perhaps the classic text on creation as revelation:
Psalm 19:1–4 — “The heavens declare the glory of God, and the sky above proclaims his handiwork. Day to day pours out speech, and night to night reveals knowledge. There is no speech, nor are there words, whose voice is not heard. Their voice goes out through all the earth, and their words to the end of the world.” (ESV)
Creation speaks — not in audible words, but in a language of order, beauty and wisdom that echoes throughout the whole earth. The scientist who studies nature is listening to this language. He may not call it that, but when he admires the elegance of a mathematical law or investigates the intricacy of a biological system, he is experiencing something of what the Psalmist describes.
Many of the great scientists throughout history experienced this wonder in their work. Johannes Kepler, the man who discovered the laws of planetary motion, explicitly described his work as “thinking God’s thoughts after Him.” Isaac Newton regarded the order of the universe as evidence of an intelligent Creator. James Clerk Maxwell, whose equations united electricity and magnetism, prayed that his work would be to God’s glory. Michael Faraday, the founder of electromagnetic theory, was a deeply believing man whose conviction that God’s creation is orderly and comprehensible drove him to discover the hidden laws of nature. These people were not believers despite their science. They were scientists whose faith precisely drove them to investigate creation.
Romans 1:19–20 emphasises the same point:
Romans 1:19–20 — “For what can be known about God is plain to them, because God has shown it to them. For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse.” (ESV)
Paul does not say that creation is the complete revelation of God; for that we need Scripture and the Spirit. But he says that creation reveals enough to leave humanity without excuse. The order and beauty of nature point to the Creator.
From this biblical framework we can say that the scientific enterprise is not merely a neutral, secular activity. It is, in its deepest essence, a calling — a response to God’s invitation to investigate and enjoy his creation.
This does not mean that every scientist is or must be a believer. Many excellent scientists are not believers, and their scientific work is no less valid for it. The point is rather that the possibility of science — the fact that nature is studyable, that the human mind is able to comprehend it, that there is order to discover — makes the most sense within a theistic framework.
Abraham Kuyper put it this way in his Stone Lectures (1898): Calvinism liberated science by teaching that nature is created (and therefore studyable), that the human mind is made in God’s image (and therefore reliable), and that all domains of life stand under God’s lordship. Kuyper left no doubt: “There is not a square inch in the whole domain of our human existence over which Christ, who is Sovereign over all, does not cry: ‘Mine!’” That includes the laboratory.
7. Practical Implications: How to Respond
How do these insights become practical? Here are a few situations that believers regularly encounter, with guidelines for how to think about them.
“I only believe what science can prove.”
This statement initially sounds reasonable. But ask yourself: can science prove this statement itself? Is there an experiment that can demonstrate that only scientifically provable things are true? No. This statement is a philosophical conviction — precisely the kind of thing it says you cannot believe.
The kindest answer is something like: “I have great respect for science. But the statement ‘only scientific knowledge is valid’ is itself not a scientific finding. It is a philosophical position. So we are already philosophising together. The question is simply: which philosophy has the best grounds?”
This approach is not aggressive. It acknowledges the value of science. It simply points out kindly that the other person has already taken a philosophical step they may not have realised.
You could also kindly ask: “Do you believe that other people truly have consciousness, or is that just an assumption?” Of course they will say they believe it. “But can you prove that scientifically? Can you demonstrate in a laboratory that your wife or your child truly has an inner life?” No. Yet it is one of the most fundamental things we know. The point is not to cause embarrassment, but to show that we all rely on more than the scientific method for our deepest convictions — and that it is entirely rational to do so.
“Science and religion are at war.”
This narrative — the so-called conflict thesis — is one of the most persistent myths in our culture. In the next session we examine it in historical detail and will see that it rests on a misunderstanding of history. For now we can simply say: the vast majority of historians of science rejected the conflict thesis long ago. The relationship between faith and science has always been far more nuanced and fruitful than the popular narrative suggests.
If someone makes this point, a good starting point is to ask: “Can you give me a specific example?” Usually they will mention Galileo (we will discuss this in the next session in detail), and it almost always turns out that the real history is far more complicated than the caricature.
“There is no evidence for God.”
This statement depends entirely on what you mean by “evidence” — and that is a philosophical question, not a scientific one.
If by “evidence” you mean “empirical, laboratory-testable data,” then it is true that God does not have that kind of evidence — because God is not a physical object that can be examined in a laboratory. But this is not a problem for theism; it is a limitation of the method. Science cannot put gravity in a test tube; it can only observe the effects of gravity. In the same way, the theist can argue that we observe the effects of God’s existence everywhere: in the existence of the universe, in the rational order of nature, in the reality of consciousness, in the moral order, in the beauty of creation.
The question is not whether there is evidence. The question is what kind of evidence is appropriate for what kind of reality. You do not prove love in a laboratory, but that does not mean love is unreal. You do not test mathematical truths with a microscope, but that does not mean mathematics is invalid. As we discussed extensively in Series 1, the arguments for God’s existence are philosophical arguments — and they are powerful, coherent arguments that have been developed and refined by the best thinkers of the past two and a half thousand years.
The Reformed tradition adds something important here. Calvin taught that the problem is not a lack of evidence; creation cries it out, as Psalm 19 says. The problem is that fallen humanity suppresses this evidence (Rom. 1:18). The sensus divinitatis, the inbuilt awareness of God, is darkened by the Fall. That is why the work of the Holy Spirit is needed to open our eyes to what truly lies before us. The evidence is there; it is our perception that is defective.
Bavinck worked out this point with great clarity. He argued that all people have an innate knowledge of God — not a complete dogmatic knowledge, but a deep, indelible awareness that there is a transcendent Reality. This knowledge, however, is clouded and suppressed by sin. The natural person sees the evidence but rejects the conclusion. He admires the order of nature but denies the Orderer. As Paul puts it in Romans 1:21: “For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.” (ESV)
We as believers do not stand in a position of weakness when we are in conversation about the evidence for God. The evidence is overwhelming: in the existence of the universe, in its rational order, in the reality of consciousness, in the moral dimension of human experience. The challenge is not a lack of evidence, but a resistance to the conclusion to which the evidence leads.
In each of these cases, the basic principle is the same: distinguish carefully between science (the method) and scientism (the philosophy). Science is our friend. Scientism is a hasty philosophical assumption that cannot justify itself.
We need not be afraid of scientific discoveries. Every true discovery is a discovery of God’s handiwork. What we must reject is not science, but the philosophically excessive interpretation of science that claims it is the only path to truth.
8. Summary and Preview
The scientific method is a powerful, disciplined way of studying the natural world. It works through empirical observation, hypothesis formation, testing and revision. Its power lies in its focus and its self-correction.
The philosophy of science — from Popper to Kuhn to Polanyi to Lakatos — shows us that science is a human enterprise: powerful, but not infallible; progressive, but not linear; rational, but not detached from tradition, judgement and trust.
Scientism — the philosophical claim that science is the only path to knowledge — is self-defeating. It makes a philosophical claim that denies its own validity. It is not science; it is bad philosophy.
The presuppositions of science are metaphysical assumptions best explained by classical theism. The God who is the Logos — the Reason behind reality — is the ground on which science stands, even when it is not aware of it.
The limits of science are real, but they are not failures. Questions about existence, consciousness, morality, meaning and order fall outside the empirical domain. To answer these questions, we need philosophy, theology and wisdom — not as a replacement for science, but as indispensable complements. As the Reformed theologian Cornelius Van Til often emphasised: all facts are God’s facts, and all true knowledge is ultimately knowledge that stands in relation to God’s self-knowledge. Science does not discover “neutral” facts; it discovers God’s works, whether the scientist realises it or not.
Scripture encourages inquiry. Creation is God’s work, and to study it is a royal honour. Science, rightly understood, is an act of wonder. And wonder is the beginning of worship.
Next Session
The next session plunges into the history of science and faith. We examine the claim that science and religion have always been at war — the so-called “conflict thesis.” This narrative is historically untenable, and the real history tells a far richer and more surprising story. From the medieval church universities that made modern science possible, to the deeply believing scientists such as Kepler, Newton and Faraday: the relationship between faith and science is a story well worth knowing properly.
Until then.