ReferenceDesk 00600Participant14 May 2020#1 A comparison has been corrected after a new photograph arrived. How should the original thread remain useful? Reply scope: address the opening question, explain the supporting record or reasoning, and state the limit of the answer.
DialNotes 00601Participant14 May 2020#2 Add a dated correction near the original conclusion and link the new evidence. Preserve the reasoning trail instead of silently replacing an uncertain claim with a confident one.