The Processual Ontology of the Markov Blanket: Enactive Inference, Boundary-Formation, and the Perspectival Mind

Abstract

The Markov blanket has become one of the most conceptually powerful and philosophically contested notions in contemporary work on the Free Energy Principle and active inference. Initially introduced within probabilistic graphical modelling as a formal condition of conditional independence, it has increasingly been used to describe the boundary between internal, external, sensory, and active states in self-organizing systems. This expansion raises a decisive neurophilosophical question: does the Markov blanket identify a real ontological boundary of organisms, brains, selves, or minds, or is it merely a useful modelling device? This article argues for a third position. The Markov blanket should be understood neither as a static metaphysical shell nor as a harmless technical diagram, but as a processual boundary-formation through which living systems maintain autonomy, regulate vulnerability, and enact perspective. Drawing on Friston’s Free Energy Principle, Clark’s process-oriented interpretation of Markov blankets, Gallagher’s account of predictive engagement, and recent debates concerning blanket reification, autonomy, and multiscale integration, the article develops a processual-perspectivist ontology of the Markov blanket. On this view, mind does not emerge behind the Markov blanket as an inner representational model of an external world. Rather, mindedness emerges through the temporally extended modulation of boundary processes by which a living system remains distinct from the world by remaining selectively open to it.