Hypothesis: Applicability of the Enter characterization

Whenever a realization is described as using derived Enter semantics, its measurement strategy belongs to the full structural class of Cheung's characterization theorem and satisfies its composability, no-signaling, nullity, continuity, and typed record requirements in their stated forms.

The imported conclusion is that, for a pure finite configuration $|\Xi ⟩$, a measured subset, and outcome $k$, the destructive component $D_k|\Xi ⟩$ has probability

and, if $p_k>0$, residual ray

No residual is prescribed on a zero-probability branch.