RE: [Demo notebook] Reference notebook: corrections and recurring beginner questions · RWI-11192

Case 39 — Crystal reflections: why a dark patch is not a coating test · source wording exercise

Method note for “Crystal reflections: why a dark patch is not a coating test”: use “Compare multiple controlled angles and describe the visible observation without asserting…” as a row heading in a proposed working record. Put the statement, its supporting source or measurement, and any unresolved detail in separate fields. This proposes a format; it supplies no additional evidence. Retain the source wording beside any paraphrase.