Reality Is a Prediction (w/ Karl Friston)

Karl Friston — the world’s most-cited neuroscientist and architect of the Free Energy Principle — joins me for a conversation about how brains make sense of reality, why we seek uncertainty, what beauty is, why psychedelics dissolve our usual models of the world, and why his only life advice is four words: keep your options open. We talk about predictive processing, active inference, surprise, Bayesian belief updating, jokes, curiosity, trauma, beauty, psychedelics, and the strange possibility that life itself is a kind of controlled hallucination. Read my Substack essay that frames part of this conversation: Beauty is a Loophole https://micahzarin.substack.com/p/bea... 0:00 — Karl Friston cold open 0:36 — Intro 1:04 — The Free Energy Principle, briefly 7:20 — Technical neuroscience: free energy, KL divergence, and stochastic dynamics 16:12 — Why neuroscience and thermodynamics meet 27:10 — Why jokes are uncertainty machines 33:33 — Curiosity, echo chambers, and shared world models 38:19 — Why some people tolerate uncertainty better 44:50 — Predicting yourself into existence 48:24 — Goblins, belief, and confirmation bias 52:40 — Psychedelics under the Free Energy Principle 1:13:31 — Awe, beauty, trauma, and dissolving old models 1:24:55 — What is beauty? 1:29:06 — Calculus, the Grand Canyon, and epistemic allure 1:38:10 — Curiosity, aging, and closing off possibility 1:41:29 — Karl Friston’s life advice