RE: [Demo notebook] QC clinic: photographic evidence and its limits · RWI-00405

Case 45 — What a water-resistance claim does and does not establish · source wording exercise

Summary draft for “What a water-resistance claim does and does not establish”: the answer addresses “A photograph or a caseback engraving is not…”; the related point is “Ask a qualified watchmaker about a suitable test for that individual…”. Keep both connected to the opening question, and mark any conclusion needing further records as unresolved. Review focus: source wording. Retain the source wording beside any paraphrase.