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plan(D-DRDT-SPLIT-1): a refusal means "not witnessed for this version" (EXO-256) - #2026
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…on (EXO-256) Losing or outgrowing a witness removes the replay guarantee; it does not refute the conclusion. With versions never compacted, an advance only ends a binding's or kept result's certification for the new version. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XAqKMPJjVvasjwqhjJ6c9p
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Docs only. This adds one bullet to §1 of
.claude/plans/dr-widefieldmask-dt-classview-v1.md, recording DECISION EXO-256.A conclusion carries a witness: the version and the frame it was derived under. Losing or outgrowing that witness removes the guarantee that the conclusion can be replayed. It does not refute the conclusion; only a counter-witness does that.
Versions are not compacted, so a witness for version v is never removed. After an advance, a binding or a kept result is simply not certified for v+1, and that is all
SourceChanged,MapChangedandCoordinatesChangedsay. A recomputation at v+1 is a new conclusion with its own witness; it does not falsify the conclusion for v.Refusals are therefore described as "not witnessed for this version", never as "invalid", "wrong" or "a gap". This decision should be revisited if compaction is ever enabled.
This is the principle behind the wording correction in #2025 and #2024 (R7).
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