On today’s pages, Chullin 36 and 37, the rabbis debate how to determine whether a sick animal was still alive at the moment it was slaughtered. Blood, movement, and other signs become crucial evidence in a surprisingly detailed discussion about the boundary between life and death. But the daf ultimately points toward a deeper question: what does it mean for a human being to be truly alive? Is life merely a matter of biology, or is something more required of us? Listen and find out.