The Free Energy Principle Is the Best Theory of Brain Function Ever Written. It Has Nothing to Say About Whether You're Conscious.
The Free Energy Principle Is the Best Theory of Brain Function Ever Written. It Has Nothing to Say About Whether You're Conscious. Today in Brighton, the Sussex AI Consciousness and Ethics Symposium (AISB 2026) opens its doors. For two days, some of the sharpest minds in consciousness science — including Anil Seth on home turf — will debate whether artificial systems can be conscious, what consciousness is, and what moral standing follows from it. On every panel where predictive processing comes up, Karl Friston's Free Energy Principle will be in the room. It deserves to be. The Free Energy Principle is the most mathematically complete, biologically grounded, and evolutionarily principled theory of brain function ever written. It explains how organisms perceive, act, learn, and model themselves and the world with a single elegant equation. It has generated extraordinary experimental predictions. If you want to understand why brains do what they do, FEP is the right framework. T...