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Karl Friston is one of the most influential neuroscientists alive and the creator of the Free Energy Principle, a unifying theory that aims to explain how brains perceive, act, learn, and remain alive in an uncertain world.

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The brain is not a passive receiver of information. It is an active prediction machine, constantly generating expectations about the world and the body, updating those beliefs when they fail, and acting to make its predictions come true. Under this framework, perception is inference, action is prediction fulfilment, emotion is bodily forecasting, and the self is a model the brain uses to explain its own persistence.

Expect to learn what the Free Energy Principle actually is, why living systems must minimise surprise, how predictive coding and active inference work, why perception is a controlled hallucination, how attention and precision shape experience, what interoceptive inference reveals about emotion and the self, how psychedelics relax beliefs, where consciousness might fit in a predictive hierarchy, and why this theory may be one of the deepest explanations of mind we currently have.

Timestamps:

00:00 Introduction to the Free Energy Principle

02:54 Deflationary Nature of the Free Energy Principle

05:48 Explaining the Free Energy Principle: High Road vs. Low Road

09:02 Predictive Processing and Perception

11:49 Active Inference and Its Implications

15:07 Interoception and Emotional Inference

18:02 Generative Models and Selfhood

20:54 The Role of Emotions in Predictive Coding

23:55 Transformative Experiences and Learning

26:44 Conclusion: The Practical Applications of the Free Energy Principle

48:58 Understanding the Role of Psychedelics in Therapy

52:48 Mechanisms of False Inference and Precision in the Brain

57:24 Relaxing Priors: The Impact of Psychedelics on Sense-Making

01:01:03 Generative Models: Individual Differences and Shared Structures

01:06:49 Cognitively Impenetrable Illusions and Prior Beliefs

01:15:15 Sensory Attenuation and the Role of Attention

01:19:03 The Free Energy Principle: Implications for Psychiatry

01:25:48 The Future of Neuroscience Education and Research

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