About this episode
The Gemara raises two difficulties with the conclusion that earthenware vessels can be koshered by placing fire inside them. First, why does the Torah command that earthenware vessels in which sanctified meat was cooked must be broken, if they could simply be put into a kiln? The answer given is that kilns could not be used in Jerusalem, as they would blacken the walls and mar the beauty of the city. Second, why were the Temple ovens made of metal if earthenware ovens could have been used and koshered? The assumption behind this question is flawed, since the ovens needed to serve as a sanctified vessel in certain cases (such as the two loaves on Shavuot and the showbread), and sanctified vessels cannot be made of earthenware. Rav Yitzchak bar Yehuda left the study hall of Rami bar Hama and joined that of Rav Sheshet. Rami bar Hama was offended, assuming Rav Yitzchak sought greater honor. Rav Yitzchak explained that he had not received satisfactory answers from Rami bar Hama, who relied on logical reasoning rather than tannaitic sources. Rami bar Hama challenged Rav Yitzchak to send him a question, promising to answer with a tannaitic source. Rav Yitzchak asked about merika and shtifa (scouring and rinsing) of a vessel in which only part was used for cooking sacrificial items: does the entire vessel require cleansing, or only the part that was used? Rami bar Hama answered logically that only the part used requires cleansing, as in the case of blood on clothing. Rav Yitzchak rejected this reasoning and cited a braita proving the opposite, thereby refuting Rami bar Hama completely. Rabbi Yehuda and Rabbi Shimon disagree about whether the requirement of merika and shtifa applies to both kodshei kodashim and kodashim kalim , or only to kodshei kodashim . From where do they derive this distinction? They both agree that merika and shtifa do not apply to truma . The Gemara raises a challenge to this from a braita, and three answers are offered.