1960
stated · doubtful
Source
Neville lectures catalog #118
Reasoning
|| v1.1/l7/propagate-node-refutation: lowered `certain` -> `doubtful` under A-121. THE CONTRADICTION: node 1072, the lecture this claim was copied to, holds the identical date 1960-??-?? as REFUTED, and records why — "Copied without semantic change from linked historical event 117. || v1.1/l1.4/w2: The lecture's own text (passage p18) refers to 'our new President who has just gone into the White House' beginning to build a monument library -- a description that fits Nixon's January 1969 inauguration and the chrome dateline '5/16/69'". 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.