A review cites another review for a claim about an experiment. How can the evidence chain be checked?
Reply scope: address the opening question, explain the supporting record or reasoning, and state the limit of the answer.
Clarification for “Reference management: distinguish primary and secondary sources”: the point beginning “Locate the primary study and confirm that it…” 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: scope. Keep the stated question separate from any broader claim.
Locate the primary study and confirm that it measured the claimed outcome. Record when only a secondary account was accessible and avoid presenting it as direct verification.