This is the daf for Shabbat. For Friday's daf, click here. Today's daf is sponsored by Vicki Herzog in honor of her father, Izzy Herzog. "May today's learning go to the Ilui of his Neshama. I miss my father each and every day." How does one determine on what basis to let a sick person eat on Yom Kippur? Rabbi Yannai discusses scenarios where the sick person may feel differently than the doctor - in those cases, on what basis do we determine whether or not to let the person eat? How can the mishna be read according to Rabbi Yannai as the mishna seems to be weighing on the side of the experts, whereas Rabbi Yannai pushes the agenda of when in doubt of cases involving life and death, one is always lenient? Mar bar Rav Ashi agrees somewhat with Rabbi Yannai but disagrees in the case where there are many doctors who think the sick person does not need to eat. Rabbi Yannai would forbid eating in that case but Mar bar Rav Ashi allows it as in his opinion, patient autonomy supersedes all. One who has a disease called bulmus (from starvation), can eat non-kosher food. If bitten by a mad dog, can one eat the lobe of the dog's liver, which was believed to be a cure? One can take and even prepare medicine on Shabbat if one's life is endangered. If a rockslide fell upon someone, at what levels of uncertainty can one still desecrate Shabbat in order to potentially save a life? If one needs to eat non-kosher food on account of bulmus, what is the hierarchy of non-kosher foods that we can feed them - we go from least serious to most serious. The gemara discusses several cases where it is unclear which is better or worse. Stories are told of rabbis who had bulmus and whether or not they stole food in order to eat. Another story is brought to highlight the importance of deriving the source of people's names to determine if they can be trusted or not. What are signs of a mad dog and how does one become a mad dog (what causes the madness)?