Methods reading room: what analytical reports actually establish · RESEARCH-29865

Case 41 — Certificate of analysis: which claim does each measurement support? · source wording exercise

Correction note for “Certificate of analysis: which claim does each measurement support?”: retain the wording beginning “A percentage without its method and sample linkage cannot…” 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.

Case 41 — Certificate of analysis: which claim does each measurement support? · source wording exercise

Summary draft for “Certificate of analysis: which claim does each measurement support?”: the answer addresses “A percentage without its method and sample linkage cannot…”; the related point is “Ask whether the sample identifier, issuing laboratory, report date and…”. Keep both connected to the opening question, and mark any conclusion needing further records as unresolved. Review focus: source wording. Retain the source wording beside any paraphrase.

Case 42 — Two laboratories, two percentages: are they measuring the same thing? · source wording exercise

A comparison table places chromatographic purity and net peptide content in one column. Both are percentages, but the reports define their denominators differently. How should the table be repaired?

Review focus: source wording. Retain the source wording beside any paraphrase. Use the original answer fragment “Do not subtract the two percentages as though they represented…” as the discussion anchor; no new event or result is supplied.

Exercise RESEARCH-29865/42: address this question within its stated limits.

Case 41 — Certificate of analysis: which claim does each measurement support? · source wording exercise

Reader check for “Certificate of analysis: which claim does each measurement support?”: distinguish the discussion point “A percentage without its method and sample linkage cannot…” 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: source wording. Retain the source wording beside any paraphrase.

Case 42 — Two laboratories, two percentages: are they measuring the same thing? · source wording exercise

Clarification for “Two laboratories, two percentages: are they measuring the same thing?”: the point beginning “Do not subtract the two percentages as though they represented…” belongs to the question as written. It should not be read as a report that a new check, purchase or experiment has been completed. Review focus: source wording. Retain the source wording beside any paraphrase.

Case 42 — Two laboratories, two percentages: are they measuring the same thing? · source wording exercise

Method note for “Two laboratories, two percentages: are they measuring the same thing?”: use “Do not subtract the two percentages as though they represented…” 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.