Question (Part 1): Furthermore, later in the Sugya, Rashi has the text 'Mar bar Rav Ashi says "Paga be'Chiti Kesheirah; Shiyer be'Chiti T'reifah" ' ...

Question (Part 2): ... and 'Paga' there, can only mean 'Paga ve'Lo Naga', since 'Shiyer be'Chiti' is equivalent to 'Paga ve'Naga'.

Question (Part 3): In that case, why can we not extrapolate from there that 'Paga' here too, means 'Paga ve'Lo Naga'; since, even though the two Amora'im may argue in Halachah - that one holds T'reifah and the other, Kasher, they do not argue with regard to the Lashon. Consequently, just as there 'Paga' means Paga ve'Lo Naga, so too here, does it mean Paga ve'Lo Naga?

Explanation #2 (Part 1): Tosfos therefore concludes that 'Paga ve'Lo Naga' means that he Shechted above the vocal cords.

Explanation #2 (Part 2): That being the case, the Gemara cites Rav Papa to resolve the She'eilah - in that, since he says in the name of Rava 'Shiyer be'Chiti, Kesheirah', which is equivalent to 'Paga ve'Naga', when Rav Papi says in the name of Rava 'Paga be'Chiti T'reifah', he means Paga ve'Lo Naga, since he Shechted above the vocal cords

Explanation #2 (Part 3): ... and the correct text in Mar bar Rav Ashi is 'Paga be'Chiti, T'reifah; Shiyer be'Chiti, Kesheirah'.

Question: The Lashon 'Mar bar Rav Ashi Amar' however, is slightly difficult, since it implies that he comes to dispute the ruling of Ravina who is mentioned before him?

Answer: Perhaps it uses that Lashon because he comes to add 'Paga be'Chiti which Ravina did not mention.

Clarification (Part 1): This is Rav Asi, the colleague of Rav Kahana, who were great men in their own right, who no longer needed the S'varos of Rav ...

Clarification (Part 2): ... whereas Rebbi Asi was somebody else, who was younger than Rav Huna, as the Gemara sttates in 'ha'Nizakin' (Gitin 59b) - 'Rebbi Ami and Rebbi Asi, important Kohanim in Eretz Yisrael, were subservient to Rav Huna.

Question: Why does the Gemara not answer that 'Rubo shel Echad' refers to the Veshet, and "one" refers to the unique Siman - like Rav Ada bar Ahavah will say later in the second Perek (28a)?

Answer: Perhaps the Rabbanan of Rebbi Yossi b'Rebbi Yehudah argue by the Veshet, just as they do by the Kaneh.

Implied Question: Why, earlier in the Sugya, does Rav Huna himself declare Pasul 'Higrim Sh'lish ve'Shachat Sh'nei Sh'lishi'?

Answer: Because there, he was citing Rav Asi, whereas here he is citing Rav.

Question: Is it not obvious that the Shechitah is Kasher, just like it is where half the Kaneh is already cut, and he came and completed the Shechitah?

Answer: The Gemara only asked this She'eilah, because it had in mind to ask another She'eilah (based on it).

Implied Question: Why is this any different than 'Shachat Sh'lish ve'Higrim Sh'lish ve'Shachat Sh'lish', which Rav Yehudah himself rules is Kasher ...

Answer (Part 1): Since there it is not in the location of the Shechitah ...

Answer (Part 2): Whereas 'Shachat bi'Mekom Nekev, which is in the location of the Shechitah, is worse (see Maharam).

Explanation #1: One can explain that it is only Ka'asher Bedi'eved, even there where he pulled the Simanim round - a Gezeirah in case he fails to do so.

Explanation #2: Rashi however, does not learn like this (but that it is permitted even Lechatchilah).

Question: The Gemara should not have said 'Mistavra', seeing as the Kashya from the Mishnah on the opinion that holds 'Machzir' is a proper Kashya?

Answer: The Machlokes is regarding Lechatchilah, but Bedi'eved, both opinions agree that it is Kasher in all cases.

Clarification: ... Hence it says 'Mistavra', since the Lashon 'ha'Molek min ha'Oref' implies like the Din of Melikah Lechatchilah, which is from the Oref.