RE: [Demo notebook] QC clinic: photographic evidence and its limits · RWI-25905

Case 208 — Crystal types: sapphire, mineral and acrylic trade-offs for daily wear · correction exercise

Reader check for “Crystal types: sapphire, mineral and acrylic trade-offs for daily wear”: distinguish the discussion point “Desk work, manual labour or sports…” from its proposed application. The thread offers a way to reason about the question, without adding a personal experience or a newly observed outcome. Review focus: correction. Preserve the old wording if a later source changes the interpretation.