17 January 1964
stated · doubtful · preferred
Source
Neville lectures catalog #179
Reasoning
|| v1.1/l7/ruleb: lowered `certain` -> `doubtful` under the #2461 §1 rule (b). The support for this date was node 1637, which has since REFUTED it, and no fenced lecture holds 1964-01-17 as a live preferred claim. Lowered rather than refuted deliberately: what was disproved is that this particular lecture was delivered that day, not that Neville lectured at all — the day stays visible as calendar supply. || v1.1/l7/event-preferred/c1: this event claim cannot remain preferred or above doubtful because every actual source lecture carrying this exact date has refuted that delivery and no source lecture independently supports it. The event occurrence is retained, not refuted; only unsupported confidence/preference is withdrawn.