Study Guide Yoma 79 The measurement for which one is liable for karet for eating on Yom Kippur is mentioned in the mishna as a date with its pit. Rav Pappa asks if it is referring to a date + its pit or not? Rav Ashi asks a similar question regarding the amount for which a bone passed on impurity – the size of barley – with its husk or not? Dry or moist? Why didn't each of them ask the other question? There is controversy among amoraim about the size of the date compared to an egg bulk. Accrording to Rav Yehuda, is more than an egg. To Rav Zevid it is less than an egg. The gemara brings a difficulty on Rav Yehuda's opinion from a case that took place in the Sukkah where it is implied that the size of a date is less than an egg. Two resolutions are brought  - of Rabbi Yirmiah and of Rava. The gemara reinforces Rav Yirmiah’s answer from a common expression A question is raised on Rava from a braita in Sukkah which deals with the things that must be eaten in the Sukkah. After resolving the difficulty, another source is brought to reinforce Rava’s answer but it is rejected. The gemara reinforces Rav Zevid’s opinion from a mishna regarding chametz and leaven but it is rejected. Another proof is brought from the blessing after meals.