Fig. 1.

A schematic diagram of a Markov Blanket. The circle shaded in gray represents the Markov blanket of Node A, consisting of A, it’s children, parents, and parents of children, with parent/child being understood in terms of cause/effect. In small script, the sub-partition of internal and external states according to the Free Energy Principle (Friston 2013); H hidden external states, I internal states, A internal active states, S internal sensory states