RE: [Demo notebook] Reference notebook: corrections and recurring beginner questions · RWI-09192

Case 23 — Crystal reflections: why a dark patch is not a coating test

Method note for “Crystal reflections: why a dark patch is not a coating test”: use “No single lighting setup settles…” 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. Keep the stated question separate from any broader claim.