Paper 43: The Intrapersonal Trap — Self-Coercion, Structural Resistance, and the Impossibility of Willpower-Driven Change: A Zero Leap Theory Analysis of Intrapersonal Intervention Dynamics

Why does the seventh diet fail harder than the first? Why does the most self-aware person often have the hardest time changing? This paper proves it's not a character flaw — it's a conservation law. Paper 43 applies Zero Leap Theory (ZLT) to intrapersonal dynamics, modeling the self as a dual system where a self-as-agent (S_A) attempts to intervene upon a self-as-target (S_T). It establishes the Willpower Impossibility Theorem: below a critical gate threshold, no finite willpower intensity produces positive expected change. Each failed attempt leaves irreversible structural residue (hysteresis), making the next attempt begin from a worse position — not psychologically, but thermodynamically. The paper completes ZLT's eight-impossibility architecture for self-operated systems: I-7 (Self-Operated Trap): Self-diagnosis under saturation is a perturbation, not an observation — the act of introspection closes the gates it tries to measure, and this damage is structurally invisible from within (meta-blindness). I-8 (Martial Transformation): When self-change simultaneously violates rate and intensity bounds, the person who emerges passes every metric — and is permanently, irreversibly someone else. The original identity doesn't recover; it ceases to exist. Three operational tools are introduced: the Internal Resistance Index (iRI) for self-coercion risk assessment, IAS-SELF (14-item audit standard with meta-blindness detection), and the Internal Via Negativa Protocol — a structured alternative to willpower-based intervention grounded in non-commutative recovery sequencing. Five independent evidence streams validate the model: Self-Determination Theory (meta-analysis, N > 100,000), the ego depletion replication crisis, restraint theory and dietary failure data, addiction neuroscience (Cochrane-level evidence), and ironic process theory. Three canonical cases (dieting, productivity systems, addiction recovery) are analyzed through the full gate framework, plus three martial transformation cases showing how extreme self-change can "succeed" by destroying the original relationship with the behavior domain. 16 falsifiable predictions are specified with a minimal two-arm experimental design. Core principle: Self-coercion under closed internal gates produces structural resistance that exceeds applied willpower. Lasting change requires gate opening, not force increase. Series: Zero Leap Theory — Personal Trap Series (Paper 42: Interpersonal → Paper 43: Intrapersonal → Paper 44: AI Self-Improvement).