
The Theory of Anything Episode 137: Ray Scott Percival on Incurable Mind Viruses
Apr 15, 2026
Ray Scott Percival, a critical-rationalist writer and filmmaker behind Myth of the Closed Mind and Liberty Loves Reason, argues humans are truth-seekers and memes favor truth. He discusses how criticism, institutions, language, and cultural turnover shape idea competition. He contrasts memetic immunizing stratagems with testable science and explores why knowledge sometimes stalls then explodes.
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Humans Prefer Truth Because Evolution Gave Us Curiosity
- Humans are robustly rational and typically prefer truth because evolution endowed us with curiosity and problem-solving adaptations.
- Ray Percival argues rational memes tend to outcompete conspiratorial or heavily immunized memes because truthfulness increases transmissibility and coherence.
Persistence of False Ideas Comes From Demographic Turnover
- Large movements can sustain false ideas if adoption matches rejection rates and new adherents replenish the group.
- Percival models idea dynamics by adoption and rejection rates to explain persistent but non-permanent dogma.
Facebook Exchange Showed Political Identity Blocking Obvious Facts
- Peter Nielsen recounts asking conservative friends about a WhiteHouse.gov page attacking Mike Pence and found none of the Trump voters defended Pence.
- The exchange illustrated how identity and source-trust can block acceptance of seemingly obvious facts in political groups.






