Who is permitted to slaughter an animal for a sacrifice? The Mishna presents the matter in a way that suggests slaughter by a non-priest is only valid post facto. However, this seems to contradict another source that explicitly permits such slaughter ab initio. Upon further analysis, this apparent contradiction is resolved: non-priests are indeed permitted to slaughter sacrificial animals from the outset.

If an impure person performs the slaughter, the sacrifice remains valid. Yet another source seems to prohibit this. The resolution lies in distinguishing between biblical and rabbinic law: while biblically valid, rabbinic authorities forbade impure individuals from slaughtering as a precaution, lest they come into contact with the sacrificial animal and thereby render it impure.

There are two different versions of a braita relating to the prohibition for an impure person to slaughter or do smicha on the animal. Each version has a different understanding of the prohibition to enter the Azara (Temple courtyard). Is it prohibited even for a small part of one's body to enter or only for the majority?

Ulla, in the name of Reish Lakish, holds that even if an impure person inserts only a small part of their body into the Azara, it is forbidden. Rav Hoshaya challenges this ruling based on a case involving a leper who experienced a seminal emission on the eve of Passover, who is allowed to go ahead with the purification process, which requires a small part of his body to enter the Azara. Ulla resolves the difficulty.

Rav Yosef infers from Ulla's resolution that in a parallel case—where zavim became impure through contact with the dead before Passover—the same ruling would apply. Abaye, however, raises two objections to Rav Yosef's inference.