Neville bases a lecture on four student letters

Neville says four letters from students arrived that week and he reads them out as the substance of the lecture.
Date (happened)
between 22 December 1967 and 28 December 1967
unresolved
  1. between 22 December 1967 and 28 December 1967 stated · preferred
    Source Closing Summary 1967 ¶0"this week", told in Closing Summary 1967 (nid 1317)
  2. 28 December 1967 stated · probable
    Source derived from the event's own title: "Neville receives four student letters used in his December 28, 1967 lecture"
    Reasoning The event held NO date claim of any kind; its own title states 1967-12-28 (day precision, parsed as "month day year"). ⚠ A title in this corpus is a DERIVED artefact — an earlier pass wrote it from the passage text — so this claim is title-derived and is marked as such rather than cited as a source document; the underlying text remains the real evidence and would supersede it. Confidence `probable`, never `certain`, for that reason. Precision is never inflated beyond the title's own wording. CALIBRATION (run v1.1/l1.4/titledate, against the 489 events that already hold an independent preferred date): day 96.1%, month 94.1% agreement. Titles naming a REFERENCE event rather than the event itself ("before", "after", "during the week of", "per ... lecture") are refused outright and never reach this write — reading an anchor as the date is the same laundering phase3b committed when it wrote telling dates onto events.
  3. between 24 April 1967 and 28 April 1967 estimated · probable
    Source Closing Summary 1967 ¶0passage 536962 (lecture nid 1317), 'These letters came this week, all came this week'; lecture's own chrome dateline d1 = 1967-04-28
    Reasoning The lecture's better-supported delivery date is 1967-04-28 (chrome dateline, probable, preferred), not the doubtful December catalogue claim; the lecture's own opening ('closing tonight...back in September') is spring-recess language that corroborates April over December. 1967-04-28 is a Friday. Using the settled 'this week' convention (Monday through the telling day), the letters that 'came this week' arrived between Monday 1967-04-24 and Friday 1967-04-28. Confidence capped at probable, inherited from the delivery claim it is derived from.
Place
Told / reported
  1. 28 December 1967 stated · doubtful
    Source Closing Summary 1967Closing Summary 1967 (nid 1317), telling 1317-1, told 1967-12-28
  2. 28 December 1967 stated · doubtful
    Source Closing Summary 1967Closing Summary 1967 (nid 1317), telling 1317-1, told 1967-12-28
    Why Corrects the confidence of the told claim written by run `corpus v1 / phase3b` at delta 0 on this event; that claim is left standing per append-only. Ceiling rule #2132.
    Reasoning Confidence only; the date is not re-adjudicated and is left exactly as written. This claim is derived from the delivery claims of node 1317 and asserts `certain`, but the strongest claim that node carries is `probable`, so there is nothing for `certain` to inherit from. nid 1317 delivery claims: 1967-12-28 doubtful; 1967-4-28 probable. Walked back to `probable`, the ceiling. Whether the DATE is right is a separate question this row does not touch; if the evidence turns out to support more confidence, it will have to come from a source other than this node.
Sources

Source

  • Closing Summary 1967 ¶0 (These letters came this week, all came this week. I can’t use all of them, I will only use four.)