Dr. Karl Friston is a neuroscientist at UCL, and he is well known for his breakthrough research on several key areas of neuroscience. One of his most notable ideas is the Free Energy Principle (FEP), a theoretical framework for understanding how our brain works. It posits that the brain is constantly trying to minimize its prediction error or the difference between what it expects to happen and what actually happens. This principle can be used to explain a wide range of neura