End of the Admissible Interior

This paper characterizes the conditions under which an admissible interior ceases to be well-defined once standing preservation and admissibility are fixed. It does not posit a physical endpoint, mechanism, or temporal termination. Instead, it identifies the structural limits beyond which interior description is no longer admissible. The analysis is eliminative. It shows that when identity persistence, redescription stability, or non-degenerate distinction fail, interior description collapses into undefined equivalence or illicit scope transport. Claims of continuation beyond these limits are shown to rely on deferred admissibility, post-selection, or global coordination, all of which violate standing conservation. The paper introduces no primitives, processes, or prognostic claims. Its contribution is boundary-setting: it clarifies what it means for an admissible interior to end at all, and why this “end” is a structural threshold rather than a physical event or empirical horizon.