Limit of the answer in “Two laboratories, two percentages: are they measuring the same thing?”: “Do not subtract the two percentages as though they represented…” 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: scope. Keep the stated question separate from any broader claim.
Correction note for “Two laboratories, two percentages: are they measuring the same thing?”: retain the wording beginning “Do not subtract the two percentages as though they represented…” 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. Keep the stated question separate from any broader claim.