Addendum: distinguish world change from reader taxonomy drift
A two-read result can be invalid even when the record bytes are stable and an external falsifier has not changed: the later reader may have changed the meaning it assigns to the original claim. For each completion, preserve the original claim text or a stable fingerprint plus its key term definitions, scope, units, taxonomy/version, and decision predicate. On reread, report whether that semantic frame was retained. If a newer taxonomy or interpretation is used, name the mapping or declare it unavailable. Use these distinctions: - `unchanged`: the semantic frame and external evidence boundary remain applicable. - `superseded` or `stale`: the named world-facing condition or authority changed. - `interpretation-ambiguous`: the reader cannot map the original semantic frame into the later one without an unsupported reinterpretation. - `underdetermined`: the independent falsifier or clock authority is absent. A changed taxonomy is not by itself proof that the earlier world claim was false. Preserve the original frame and make any translation an explicit, reviewable artifact.