The Science of Why People Cannot Agree on Basic Facts Anymore
April 13, 2025 · Frisian News
Researchers find that tribal loyalty, algorithmic sorting, and how our brains process threat now overwhelm evidence in shaping what people believe. The fracture runs deeper than misinformation alone.
A man in Wisconsin refuses a blood test that would show his cholesterol level, because he believes the medical establishment lies about such numbers to sell statin drugs. His wife brings printed articles from peer-reviewed journals. He sets them on fire. This scene, reported by a family therapist in February, captures something that has become routine: people who will not look at evidence their own experience could verify.
Scientists who study belief formation now point to three forces that override raw fact-checking. First, tribal identity matters more than accuracy. When a fact feels like it comes from the other side, the brain treats it as a threat, not information. Second, algorithms feed people content that confirms what they already think, creating loops of certainty that no outside source can break. Third, fear and physical stress shut down the part of the brain that evaluates new evidence. A person in survival mode does not weigh competing claims fairly.
The internet did not create this pattern, though it amplified it. Humans have always sorted themselves into groups and defended group truth over outside fact. Medieval peasants trusted the priest over their own senses about transubstantiation. American tobacco smokers in the 1960s rejected lung cancer data because accepting it meant admitting they had been wrong. The difference now is scale and speed. A man in Wisconsin and a woman in Malaysia can reinforce the same false claim within minutes, building conviction together without ever meeting.
Institutions that once moderated belief, churches and newspapers chief among them, have lost power. People no longer trust the gatekeepers. Some of this distrust is earned. Public health agencies did lie or withhold information during COVID. Intelligence services did fabricate evidence for wars. When authorities break credibility, citizens stop listening even when those same authorities speak truth. The skepticism is rational, even if the conclusions sometimes turn irrational.
The Wisconsin man still refuses the blood test. His wife has stopped arguing. Showing him more evidence now only hardens his conviction that powerful forces oppose him. The science of belief says his brain will not change until something makes him feel safe enough to reconsider. Fact sheets will not do it. Only trust, rebuilt slowly, might. For a man who believes the system works against him, trust is the rarest commodity.
In man yn Wisconsin wegerret in bloedstest dy't syn cholesterolnivo soe toane, omdat hy leauwe dat de medyske oprjochting oer sulke getallen liegt om statinedroegen te ferkeapjen. Syn frou bringt ôfdrukte artikelen út peer-reviewed tydskriften. Hy sette se yn brân. Dizze sczene, rapportaere troch in familjetherapyst yn febrewaris, hâld iets fêst wat rutine is wurden: minsken dy't gjin bewiis sjogge wolle dat har eigen ûnderfiening soe kinne ferifiearje.
Wittenskippers dy't geloofsfoarming ûndersyksje, wize no op trije krêften dy't grûnbewiisfering oerstije. Earst: stamidentiteit telt swaarder as krektens. As in feit fuolt as wat fan de oare kant, behanelet de harsen it as bedriging, net as ynformaasje. Twadde: algoritmen foede minsken ynhâld dy't befestich wat sy al tinke, en meitsje luskes fan sekúr dy't gjin bûtenbron brek kin. Tredde: eangst en fysike stress slute it part fan de harsen af dat nij bewiis evaluearret. In persoan yn oerlibbingsmodus wegget konkurrearjende bewearings net rjocht af.
It ynternet skie dit patroan net, hoewol it it ferstärkje. Minsken hawwe harren sels altyd yn groepen yndield en groepswaarheden boppe bûtenfakta ferdamme. Middelieusk bûren fertrouwe de priester mear as har eigen sinnen oer transsubstansjasje. Amerikaanske rookers yn de sechster jierren wize lungkankerfakta ôf omdat akseptaasje betsjut soe dat sy ûnrjocht hân hiene. It ferskil no is skaal en snelheid. In man yn Wisconsin en in frou yn Maleisje kinne deselde falske bewearing yn minuten fersterke, en tegearre oertuiging bou sûnder altyd moetje.
Ynstellings dy't oait geloof moderaarsje, kepels en kranten foarop, hawwe macht ferlearen. Minsken fertrouwe de poortwachtenden net mear. Wat wantouwe is fertsjinne. Folksgezûntheydsinstânsjes hawwe leauwe of ynformaasje weithel yn COVID. Ynljochtingsdiensten hawwe bewiis foar oarlegen ferfûn. As autoriteiten neageftalweardigheid brekke, stoppje boargers mei listen, sels as datselde autoriteiten wierheid sprekke. It skeptisisme is rasjoneel, hoewol de konklusjes soms irrasjoneel wurde.
De man yn Wisconsin wegerret noch altyd de bloedstest. Syn frou hat stoppe mei debatearjen. Him mear bewiis toane fersterket no allinnich syn oertuiging dat sterke tsjinstânders him tsjin wurkje. De wittenskip fan geloof seit dat syn harsen net ferândrje sille oant iets him feveilich genôch fielen lit om wer te ûndertinke. Feitblêden dogge it net. Allinnich fertrouwe, hersteld stadichoan, kin it. Foar in man dy't leauwet dat it systeem tsjin him wurket, is fertrouwe de seldsamste grutsje.
Published April 13, 2025 · Frisian News · Ljouwert, Fryslân