Three difficulties are raised from tannaitic sources against the opinion of Rav Nachman, Rav Avram, and Rav Yitzchak that a person cannot forbid property that is not theirs (ein adam oser davar she'eino shelo), and they are resolved. The first difficulty is from the braita regarding a sin offering slaughtered outside the Temple for idol worship, which the Gemara resolves by explaining that since the sacrifice achieves atonement for the owner, it is legally considered his own property. The second difficulty is from the Mishna regarding two people holding a knife where one slaughters for an idol, and the third is from a braita regarding one who renders another's property impure, mixes it with tithed produce, or pours it as an idolatrous libation. The Gemara resolves these by explaining that the individual has a financial partnership in the item.

The Gemara suggests that the debate between Rav Huna and Rav Nachman is a tannaitic dispute, quoting a dispute regarding whether a gentile can forbid a Jew's wine by offering it up as a libation to idols. Rav Nachman, however, rejects the comparison, as a Jew who does the same thing would be doing it just to annoy his friend, and does not really intend to worship the idol. Some difficulties are raised against this theory from tannaitic sources, but are resolved by explaining them as referring to cases where the Jew is an apostate.

The Mishna rules that one may not slaughter an animal directly into seas, rivers, or vessels because it looks to others like they are offering it to an idol (mar'it ayin). However, it is permitted to slaughter into a circular pool of water, which Rava clarifies must be murky. Furthermore, one may not slaughter directly into a pit (gumma) anywhere, but the Mishna then permits doing so in one's house. Abaye and Rava each resolve this seemingly contradictory statement in different manners, and Rava rejects Abaye's explanation. Rava explains that a person may slaughter next to a pit in their private courtyard so that the blood flows into it to keep the yard clean. In the marketplace, even this is strictly forbidden to prevent copying heretical practices (minim), and anyone who does so must be investigated for heresy. A braita is brought to support Rava's explanation.

The Mishna establishes that slaughtering a non-sacrifice (chullin) for the sake of a sacrifice that can be voluntarily vowed or donated - such as an olah, asham talui, or todah - renders the shechita invalid, whereas Rabbi Shimon permits it. The rabbis are concerned that people will see this and think that one can slaughter sacrifices outside the Temple. Conversely, slaughtering for sacrifices that cannot be voluntarily vowed, like a sin offering, is valid, as people will assume the slaughterer is just saying it is for the sake of that offering but does not really intend to offer a sacrifice outside the Temple.