5min chapter

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas cover image

87 | Karl Friston on Brains, Predictions, and Free Energy

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

CHAPTER

Variational Free Energy

The variational free energy defines what's called approximate Bayesian inference. It scores the divergence between the current state and the probability distribution it would have on its attracting set. The negative logarithm of model evidence, which is essentially our self-information, can always be minimized if you were a perfect Bayesian statistician.

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