How inaccessible sources complicate historical disagreement

A dispute over a published paper illustrates the difficulty of testing criticism based on sources a researcher cannot obtain or read. The critic supplied Japanese source names, but the author of the paper could neither locate copies for translation nor read the originals. Those sources might have changed the account; their inaccessibility did not establish that the criticism was wrong. The paper instead documented the British archival evidence it used, allowing readers to trace the argument and challenge its basis. Helpful criticism needs enough source information for another researcher to investigate it. Testing one's own finished paper as though its conclusion were wrong is offered as a way to find weaknesses before publication.