Rabbi Yonatan says in the name of Rabbi that someone who eats a shelishi (third degree) of actual teruma is forbidden to eat teruma but is allowed to touch it. Ulla had said the same thing regarding one who eats a shelishi of chullin that was treated like teruma. The Gemara explains why both statements were needed and could not have necessarily been derived one from the other.

Rav Yitzchak bar Shmuel bar Marta says that someone who eats a shelishi of chullin treated like kodashim is still pure to eat actual kodashim, because only real kodashim that are sanctified by an action (like a meal offering when placed in a sanctified vessel or an animal when slaughtered) can create a revi'i (fourth degree). Rami bar Hama challenges this from Rabbi Yehoshua's opinion in the Mishna in Taharot (2:2) that a shelishi that was treated as teruma is considered a sheni for kodashim. The difficulty is resolved by distinguishing between items treated as teruma and those treated as kodashim. The reason to distinguish is that those who are careful from impurities for teruma are not cautious enough regarding kodashim. This distinction is proven from a Mishna in Chagiga (18b). Rava, however, disagrees with the application of the Mishna in Chagiga to this case, and disagrees with Rav Yitzchak. A difficulty is raised against this distinction from a Mishna in Chagiga (24b) where one designated part of the wine in a barrel of teruma to be kodashim. If the protection for teruma is not valid for kodashim, wouldn't the teruma wine make the kodashim wine impure? To resolve this they distinguish between teruma and kodashim that are combined and those that are not combined.

A second difficulty on Rav Yitzchak is brought from a braita that clearly states that a shelishi of items that are treated as kodashim passes on impurity to kodashim. To resolve this difficulty, they conclude that there is a tannaitic debate and brings a braita with two opinions that both support Rav Yitzchak's position.

Rabbi Shimon stated in the Mishna that shechita makes the animal susceptible to impurity. Rav Asi explains that Rabbi Shimon means only shechita makes it susceptible, but the blood of the animal does not. The Gemara challenges this to see if he means only shechita, and blood from the slaughter would not be considered a liquid that could render something susceptible to impurity, or did he mean shechita in addition to blood, as blood of the slaughter could also render something susceptible to impurity. Our Mishna is brought to strengthen Rav Asi's reading, but it is rejected as inconclusive. Then three other tannaitic sources are brought to try to either prove or disprove Rav Assi's claim, however, all are deemed inconclusive.