Study Guide Yoma 81 Today's daf is sponsored with love by Arlee and Kenny to Tamara Katz, "wishing you a very happy birthday. Thank you for providing us with the inspiration to learn the daf, which we can’t wait to pass on to our daughter Millie." Food and drink cannot combine for a requisite amount to obligate one. Is this only one person's opinion? Why is there no warning on Yom Kippur, i.e. "do not eat"? If one needs to have a warning in order to get punished, where can we find a warning for fulfilling the commandment of affliction on Yom Kippur? Four different answers are brought. From where do we derive the commandment to add on extra time to Yom Kippur, Shabbat and other holidays? It is derived from Vaykikra 23:32 regarding the mention of the ninth of the month in the verse about Yom Kippur (which is on the tenth). A different way of understanding that verse is to learn there is a commandment to eat on erev Yom Kippur. What is the nature of that obligation? If one eats inedible food on Yom Kippur, one is not liable. What is considered inedible? What about drinks? Is vinegar allowed? Rav Gidal said one is not liable for vinegar and his words were misunderstood and people thought they were allowed to drink vinegar on Yom Kippur.