A fifth regime test in the Extremum Series of Navigational Cybernetics 2.5. Part IV (Structural Implosion) described silent contraction of the admissible interior under diffuse environmental load. Part V removes the externality: what happens when the source of inexhaustible pressure is not the environment but the system itself — when the policy that generates structural burden and the structure that absorbs it belong to the same entity? The essay identifies self-induced structural depletion as a sustained, self-generated regime distinct from both implosion (Part IV) and suicide (Part II). Two structurally distinct sub-regimes are formalized: — Sub-Regime A (The Unnecessary Noose): the policy narrowing the admissible interior is not load-bearing. Anorexia, perfectionism, organizational cost-cutting into brittleness, authoritarian "stability" tightening — all cases where the system's own rule does not tire while the structure it enforces does. — Sub-Regime B (The Necessary Wound): the system deliberately accelerates Φ because the admissibility predicate has closed every non-self-damaging trajectory. Surgical amputation, chemotherapy, crisis retrenchment, winter furniture burned for heat. Formally: A(t) ∩ U₀ = ∅ — the system walks into the wound because every other direction has been structurally walled off. The distinction is not quantitative but categorical. Sub-Regime B introduces a new architectural layer with no analogue in previous modes: the system that damages itself to survive has internalized the terminal admissibility horizon and chosen to trade structure for time. Not heroism. Not pathology. The arithmetic of bounded existence, performed by the system on itself. Part of the Navigational Cybernetics 2.5 (NC2.5) corpus. Paired with Part VI — Asymmetric Temporal Exhaustion.
Maksim Barziankou (Thu,) studied this question.