RE: [Demo notebook] QC clinic: photographic evidence and its limits · RWI-29469

Case 50 — Crystal reflections: why a dark patch is not a coating test · source wording exercise

Limit of the answer in “Crystal reflections: why a dark patch is not a coating test”: “Compare multiple controlled angles and describe the visible observation without asserting…” is an excerpt from the discussion, not an independent verification. A reader needs the relevant original material before treating an interpretation as established. Review focus: source wording. Retain the source wording beside any paraphrase.