Neville's first exposure to the teaching
Date (happened)
between 19 February 1925 and 18 February 1928
unresolved
between 19 February 1925 and 18 February 1928
estimated · possible · preferred
Reasoning
Against the corpus's certain birth anchor (hist_event 950, 1905-02-19), 'twenty or twenty-two' spans from the day he turned 20 (1925-02-19) to the day before he turned 23 (1928-02-18). This is a decades-later recollection giving two discrete candidate ages rather than one figure, so kept as a between-range rather than a point; confidence capped at possible for the compounded imprecision.
Told / reported
14 July 1969
estimated · probable
Reasoning
The memory is recounted in lecture nid 1024, whose standing delivery date is 1969-07-14 (probable, preferred; corroborated by internal content -- Santa Barbara oil blowout, Vietnam, moon-landing proximity -- per the lecture's own processing notes), which supersedes the two older, now-refuted 1957/1958 catalog claims. This is the telling date, not the happening date.