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.
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.
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.