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Your brain guesses at reality instead of recording it

A gray apple looks red because your brain invents reality, guessing ahead every 200 milliseconds.

Ellsworth Toohey
Aug 05, 2026
∙ Paid
brain invents reality — Edward H. Adelson / CC BY 3.0 (Wikimedia Commons)
brain invents reality — Edward H. Adelson / CC BY 3.0 (Wikimedia Commons)

Your brain isn't showing you the world so much as guessing at it. That's the argument from psychologist Daniel Yon, who runs the Uncertainty Lab at Birkbeck, University of London. The brain, Yon writes, works "like a scientist," constantly forming hypotheses about what's out there …

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