27 November 1964
stated · doubtful
Source
[merged from #1084] Neville lectures catalog #762
Reasoning
|| v1.1/l7/propagate-node-refutation: lowered `certain` -> `doubtful` under A-121. THE CONTRADICTION: node 1175, the lecture this claim was copied to, holds the identical date 1964-11-27 as REFUTED, and records why — "Copied without semantic change from linked historical event 241. || v1.1/l7/apply/c1: refuted by L7 adjudication (#2363), shape `internal_anchor`. The delivery date that stands on this lecture is 1965-11-30. Full evidence in npr 73966.". A delivery date refuted on the lecture cannot stand as `certain` on the lecture event it was copied from. ⛔ Lowered only, never refuted: A-121's floor is `doubtful`, and nothing here is deleted — the date, its type, its source note and the prior confidence (certain) all survive, so this reverses from the ledger.