Method note for “Expiry questions: why appearance cannot settle them”: use “Check the original label and ask a pharmacist about…” 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.

Correction note for “Expiry questions: why appearance cannot settle them”: retain the wording beginning “Check the original label and ask a pharmacist about…” in the record. If later material changes it, add the date, the changed wording and the source for that change; do not invent a completed correction here. Retain the source wording beside any paraphrase.

Limit of the answer in “Expiry questions: why appearance cannot settle them”: “Check the original label and ask a pharmacist about…” 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.