What Is Free Energy Principle

The free energy principle is a mathematical principle of information physics that suggests the brain processes information and makes predictions about the world. Proposed by Karl Friston, this principle has been applied to fMRI brain imaging data and has led to wide-ranging inferences about brain function, perception, and action. However, its applicability to living systems has been questioned. The free energy principle is a key concept in neuroscience, closely related to cognitive science and artificial intelligence.