Neville tells the audience about reading Richard Feynman's 1949 Nobel-winning paper on the positron and quotes two passages from it.
Date (happened)
17 February 1967
unresolved
17 February 1967
estimated · preferred
Why
Speech-act case: existing field_told claim for the same moment on this event is left untouched per the append-only rule.
Reasoning
The event is Neville reading Feynman's paper aloud from the platform (passage 535122), so happening and telling are the same moment -- the lecture's own delivery date. nid 1261's delivery claim for 1967-02-17 is corroborated by two independent sources (catalog #342 and an independent chrome dateline) that agree exactly, both certain, so this derived claim inherits certain.
before 1967
bound · possible
Reasoning
Qualifying passage ids [535122] belong to telling lecture nids [1261]. Each listed lecture contributes the selected safe envelope year 1967 (MAX of its non-refuted delivery years); 1967 is the MIN across telling lectures.
before 17 February 1967
bound
Why
Tightens the phase4 L6a envelope from before 1967 to before 1967-02-17.
Reasoning
L6a envelope tightened to the telling day of nid 1261 (certain delivery 1967-02-17); same premise, finer precision. The phase4 L6a bound on this event is `before 1967`, an envelope over delivery YEARS computed without reading text. Its premise is that the fact is true by the time it is told; on that same premise the DAY of the telling is a strictly better upper bound. Nothing is re-decided — the bound is stated to the precision the evidence always supported. The delivery claim for 1967-02-17 on nid 1261 is held at `certain` by the corpus, which is what carries this claim. #2274; the L6a row stands beside this one.
Sources
Source
- Remembrance of Things Future ¶47 (Now, I didn’t write that, that’s Feynman. These are the words, I am quoting accurately, these are the words of Richard Feynman)