Rav Nachman states in the name of Rav that meat is permitted if someone supervised the slaughter throughout the process. The Gemara questions why supervision is necessary, given the principle that most who engage in slaughtering are experts. It concludes that the case involves someone known to be ignorant of the laws of shechita who successfully severed the first siman (sign); however, this is insufficient to assume the second will be handled correctly, thus requiring supervision to ensure no disqualifying error occurs during the remainder of the slaughter.

Rav Dimi bar Yosef asked Rav Nachman: If an agent is appointed to slaughter an animal or separate teruma (tithes), and the owner subsequently finds the meat slaughtered or the produce tithed, can we assume the agent performed the task and the food is permitted? Rav Nachman distinguished between the two: the meat is permitted, but the produce is not. He explained that we cannot automatically assume the agent performed the task, and must consider that a third party might have intervened. Regarding shechita, this is acceptable because of the presumption that most slaughterers are experts. However, regarding teruma, if a third party separates tithes without the owner's permission, the act is legally ineffective.

The Gemara suggests that the question of whether we presume most slaughterers are experts is a Tannaitic dispute, but this suggestion is ultimately rejected.

Although a deaf-mute, a minor, or a mentally incompetent person may slaughter under supervision, the Gemara infers from the Mishna's phrasing that one should not grant them an animal to slaughter ab initio. Furthermore, the fact that their slaughter is valid and the meat is permitted indicates that slaughtering does not require intent (kavana), a position attributed to Rabbi Natan.