How do we determine if someone is truly dead? This question is central to the ability to donate and receive organs, and to determine when a dying patient can be taken off of life support. If brain death is considered to be death according to halakha, organ donation becomes a possibility. But if the Talmud never discusses the brain in this context, what could be the halakhic basis for this? See how Rav Moshe deals with this and how his approach to permitting heart transplants changed over time. Learn more in the latest episode of Iggross Moshe.