Library-card analogy, corrected

If books contain classical text from a known alphabet, enough photocopies may identify that text. This is a classical reconstruction task.

If “book” denotes an arbitrary unknown quantum state, photocopying means measurement. A purely classical collection cannot reconstruct all amplitudes from one copy or preserve its reference entanglement. The library must return a quantum carrier for that task. Classical index cards may select a branch decoder only under the hybrid conditions of Theorem thm:hybrid.

Emptying the named locked stack is interface termination. It does not prove that every physical implementation factor has disappeared, or that earlier photocopies have become pure.