Functional Closure

Minimum Viable Interiority's transposition of Mossio and Moreno's organizational closure (a living system collectively maintaining the constraints that keep it going) from biology to agent design, and from physical/biological to "psychological self-maintenance." A functionally closed layer is one whose dynamics are "causally explainable only by the events observed within its respective domain" — a constitutive rather than etiological explanation. Models on one layer intra-act; closed systems inter-act. Stacking closures (each pandemonium nested inside the next, each layer irreducible to the one below) is what is claimed to produce interiority: opacity to outside observers and to the agent's own introspection. Watch the drift from biological self-maintenance toward software-style information hiding.