The Human Upgrade: Biohacking for Longevity & Performance

AI Expert Says: Humans Are Just Mystical Meat Robots : 1429

40 snips
Mar 10, 2026
Tom Griffiths, a Princeton computational cognitive scientist who studies the math behind mind and AI. He and Dave probe how AI reveals quirks of human thought. Short takes on inner speech, mitochondria as energy-driven processors, emotions as computational tools, resource-rational decision-making, and which AI styles avoid messing with your head.
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INSIGHT

Three Math Threads Behind Thought

  • Three mathematical frameworks underpin models of cognition: logic for rules, vector spaces/neural nets for graded concepts, and probability for handling uncertainty.
  • Tom ties logic to symbolic structure, neural networks to concept spaces, and probability to belief updating.
ANECDOTE

Parole Decisions Fall As Judges Tire

  • Dave Asprey recalls the Israeli parole study where parole grants correlated with time of day due to judges' decision fatigue.
  • The example shows defaulting to 'no' when fatigued because refusing costs less cognitive effort than approving.
ADVICE

Change The Environment To Aid Choices

  • Instead of forcing full rational deliberation, change the environment: precompute outcomes or structure choices to reduce cognitive load.
  • Tom calls this 'resource rational nudging' and says it helps people make better decisions under limited resources.
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