one examines a knife to ensure that it is perfectly smooth with no nicks and gives it to the transgressor, and it is permitted to eat from what he slaughtered. But if one did not examine the knife and give it to the transgressor, the transgressor may not slaughter an animal ab initio. And if the transgressor slaughtered an animal, one examines his knife after his slaughter. If his knife is found to be perfectly smooth, it is permitted to eat meat from what he slaughtered, and if not, it is prohibited to eat from what he slaughtered.

And it teaches: This is the halakha with regard to all people except for a deaf-mute, an imbecile, and a minor, whose slaughter is not valid even after the fact. The reason the Sages deemed such slaughter not valid is lest people in these categories interrupt the slaughter, lest they press the knife in the course of slaughter, and lest they conceal the knife beneath the windpipe or the gullet in the course of an inverted slaughter. The Gemara asks: If so, with regard to the clause in the mishna that follows: And any of them who slaughtered an animal and others see and supervise them, their slaughter is valid, to which case in the mishna is it referring? If we say that the reference is to the case of a deaf-mute, an imbecile, and a minor, since that is the halakha to which it stands adjacent, the tanna should have formulated the phrase: And if they slaughtered, instead of: And any of them who slaughtered.

Rather, perhaps the reference is to the case of a Jewish transgressor who slaughters. The Gemara asks: In what case? If it is a case where one examined a knife and gave it to the transgressor, didn’t you say in that case that the transgressor may slaughter ab initio? Rather, perhaps the reference is to a case where one did not examine the knife. If it is a case where the knife is available, let him examine the knife now to make sure that there are no nicks. And if it is a case where the knife is not available, then when others see him slaughter, what of it? How can one eat from what he slaughtered? Perhaps he slaughtered the animal with a notched knife. The Gemara concedes that the formulation of the mishna: And any of them who slaughtered, is difficult according to this explanation of the mishna.

§ Ravina said in resolution of the apparent contradiction in the mishna that this is what the mishna is teaching: Everyone slaughters, i.e., everyone who is an expert in the halakhot of ritual slaughter slaughters; all experts are qualified to slaughter, and this is the halakha even if they are not established as accustomed to slaughter with a steady hand and without fainting.

In what case is this statement said? It is said in a case where people know about him that he knows and is able to recite the halakhot of ritual slaughter. But if people do not know about him that he knows and is able to recite the halakhot of ritual slaughter, he may not slaughter an animal ab initio. And if he slaughtered an animal, one examines him; if he knows and is able to recite the halakhot of ritual slaughter it is permitted to eat meat from what he slaughtered, and if not, it is prohibited to eat from what he slaughtered.

And it teaches: This is the halakha with regard to all people except for a deaf-mute, an imbecile, and a minor, whose slaughter is not valid even after the fact. The reason the Sages deemed such slaughter not valid is lest people in these categories interrupt the slaughter, lest they press the knife in the course of slaughter, and lest they conceal the knife beneath the windpipe or the gullet in the course of an inverted slaughter. The Gemara asks: If so, with regard to the clause in the mishna that follows: And any of them who slaughtered an animal and others see and supervise them, their slaughter is valid, to which case in the mishna is this referring? If we say that the reference is to the case of a deaf-mute, an imbecile, and a minor, since that is the halakha to which it stands adjacent, the tanna should have formulated the phrase: And if they slaughtered, instead of: And any of them who slaughtered.

Rather, perhaps the reference is to a case where they are not experts. The Gemara rejects the possibility that they are not experts, as in that case, if one examines him after the slaughter to determine his expertise in the halakhot of ritual slaughter, it is sufficient. The Gemara answers: Supervision is necessary in the case where the one who slaughtered the animal is not before us so that we can examine him.

And there are those who say that Ravina said that this is what the mishna is teaching: Everyone slaughters, i.e., everyone who is established as accustomed to slaughter with a steady hand and without fainting slaughters; all those established concerning this are qualified to slaughter, even if it is not known if they are experts. In what case is this statement said? It is said in a case where they slaughtered before us two or three times and did not faint. But if he did not slaughter before us two or three times he may not slaughter an animal ab initio, lest he faint. And if he slaughtered an animal and said: It is clear to me that I did not faint, his slaughter is valid.

And it teaches: This is the halakha with regard to all people except for a deaf-mute, an imbecile, and a minor, whose slaughter is not valid even after the fact. The reason the Sages deemed such slaughter not valid is lest people in these categories interrupt the slaughter, lest they press the knife in the course of slaughter, and lest they conceal the knife beneath the windpipe or the gullet in the course of an inverted slaughter. The Gemara asks: If so, with regard to the clause in the mishna that follows: And any of them who slaughtered an animal and others see and supervise them, their slaughter is valid, to which case in the mishna is this referring? If we say that the reference is to the case of a deaf-mute, an imbecile, and a minor, since that is the halakha to which it stands adjacent, the tanna should have formulated the phrase: And if they slaughtered, instead of: And any of them who slaughtered.

Rather, perhaps the reference is to a case where they are not established as accustomed to slaughter with a steady hand and without fainting. The Gemara rejects that possibility, as in that case, didn’t you say that if one said after the slaughter: It is clear to me that I did not faint, it is sufficient? The Gemara answers: Supervision is necessary in the case where the one who slaughtered the animal is not before us so that we can ask him whether he fainted.

The Gemara summarizes: Ravina and Rabba bar Ulla did not say a resolution to the apparent contradiction in the mishna like that of Abaye, Rava, and Rav Ashi due to the fact that the phrase in the mishna: And any of them who slaughtered, is difficult for them.

All of the other amora’im did not say a resolution to the apparent contradiction in the mishna like that of Rabba bar Ulla, who interprets the mishna as referring to the case of a ritually impure person; according to that version that you said: The mishna here is the primary source for the halakha of a ritually impure person who slaughtered a sacrificial animal, the other amora’im reject this interpretation because, on the contrary, the mishna there is the primary source, as it is standing in tractate Zevaḥim, which deals with sacrificial animals.

The amora’im also reject the interpretation according to that other version that you said: The mishna there is the primary source, and here, since the tanna taught the case of a ritually impure person who slaughtered non-sacred animals, he teaches the case of a ritually impure person who slaughtered sacrificial animals as well. The reason is that it was not necessary for the tanna to teach the case itself of a ritually impure person who slaughtered a non-sacred animal, as in the opinion of the other amora’im, the halakhic status of non-sacred foods that were prepared according to the strictures of sacrificial food is not like that of sacrificial food, and it is permitted to render such food impure.

All of the other amora’im did not say a resolution to the apparent contradiction in the mishna like that of Ravina; according to that version that he said: Experts, yes, may slaughter ab initio, but those that it is not known that they are experts, no, they may not slaughter ab initio, the other amora’im disagree because they hold that the majority of those associated with slaughter are experts. Therefore, even if it is not known whether they are experts, their slaughter is valid.

According to that version that Ravina said: People who are established as accustomed to slaughter without fainting, yes, they may slaughter ab initio, but people who are not established as accustomed to slaughter without fainting, no, they may not slaughter ab initio, the other amora’im disagree because they hold that we are not concerned for the possibility of fainting.

Rava did not say a resolution like that of Abaye, that the mishna is referring to a Samaritan, in accordance with the difficulty that he raised from the halakha of wine belonging to a Jew to which a gentile has access. Abaye did not say a resolution like that of Rava, that a Samaritan may slaughter ab initio if a Jew enters and exits, because there, in the case of wine, the gentile does not touch the wine; therefore, it is sufficient if the Jew enters and exits. Here, in the case of slaughter, the Samaritan touches the animal in the course of slaughter, and he can disqualify the slaughter in an instant. Therefore, Abaye holds that it is insufficient for a Jew to enter and exit.

Rav Ashi did not say a resolution like that of both of them, Abaye and Rava, because he holds: Samaritans are converts who converted under duress due to the threat posed by lions, and their conversion is void; therefore, their halakhic status is that of a gentile, whose slaughter is not valid.

Abaye did not say a resolution like that of Rav Ashi, who interprets the mishna as referring to a Jewish transgressor whose transgression is that he eats unslaughtered animal carcasses to satisfy his appetite, because he does not hold that which Rava said, that such a transgressor may slaughter ab initio if his knife is examined beforehand by someone reliable. But as for Rava, what is the reason that he did not say a resolution in accordance with his own statement of halakha with regard to the slaughter of a transgressor and explain the mishna in the manner that Rav Ashi did?

The Gemara answers: When Rava explained that the tanna in the mishna is referring to the slaughter of a Samaritan, he stated his opinion in accordance with the statement of Abaye in order to resolve the difficulty that Abaye raised; but he himself does not hold accordingly.

§ The Sages taught in a baraita: The slaughter performed by a Samaritan is permitted ab initio. In what case is this statement said? It is said in a case where there is a Jew standing over him and supervising to ensure that the slaughter was performed properly. But if the Jew came and found that the Samaritan already slaughtered the animal, the Jew cuts an olive-bulk of meat from the slaughtered animal and gives it to the Samaritan to eat. If the Samaritan ate it, it is permitted for the Jew to eat meat from what the Samaritan slaughtered. But if the Samaritan did not eat the meat, it is prohibited to eat from what the Samaritan slaughtered.

Similarly, if the Jew found in the possession of a Samaritan