How could Jacob conclude that Joseph had died from recognizing his clothing, if a person’s death is not established on the basis of clothing alone?

This source-based Torah study examines the question: How could Jacob conclude that Joseph had died from recognizing his clothing, if a person’s death is not established on the basis of clothing alone? It follows the canonical Hebrew discussion through the weekly Torah portion and the Jewish sources cited there. This localized discovery layer is a concise abstract, not a full translation and not a practical ruling. Any halakhic, medical, legal, security, bereavement, political, mystical or other sensitive claim remains subject to the canonical review status and should not be treated as individualized advice or as an empirical conclusion.