Why Chiral Asymmetry Is Not Optional

This paper establishes that chiral asymmetry is not a contingent feature of physical models, nor an empirical add-on, but a structural necessity once admissibility, standing conservation, and local interaction are fixed. The analysis is eliminative rather than constructive: it shows that any framework attempting to preserve full mirror symmetry at the level of admissible interaction collapses either identity persistence, irreversible differentiation, or standing itself. Chirality is identified as the minimal asymmetry required to support non-degenerate local interactions without illicit scope transport, post-selection, or global coordination. The result does not invoke forces, particles, or empirical fitting, and introduces no new primitives. Instead, it classifies chiral asymmetry as a forced consequence of standing-preserving bookkeeping, clarifying why parity symmetry can appear representationally while failing to hold as an admissible structural invariant. The paper’s contribution is boundary-setting: it explains why chiral asymmetry must appear in any admissible local skin, not how it is implemented or measured.