Implied question: We could have challenged Rabah himself, for he holds below (12b) that a Korah is due to a Heker (indication, to remind people that there are restrictions on carrying, lest they come to carry in Reshus ha'Rabim)!

Answer: Because Rav Nachman explicitly explains that they argue about a Heker, we ask [according to him] why they needed to argue in two places.

Explanation #1 (Ri): More sun [comes through] than shade, for the wind blows and scatters [the Sechach] until there is more sun than shade.

Proof: If through just Kalishah (viewing what is above 20 it as if it was removed) there is more sun than shade, how could we be Machshir in the latter version? Pasul Sechach does not join with Kosher Sechach, like we say in Sukah (9b) about one who makes a Sukah under a tree!

Question: It says in Sukah (4a) that if a Sukah was taller than 20 Amos, and Hutzin (branches) descend within 20, if there is more shade than sun, it is Kosher. If not, it is Pasul;

Why is it Kosher? If you do Kalishah, the branches will fall below!

Partial answer: According to the latter version here (of Rabah, that we are lenient about Sukah), it is fine.

Partial answer: Also [in the first version, that is stringent about Sukah] according to Rava of Parzakya, who explains that it is because [Sukah] is of an individual, and people do not remind each other, it is fine. We can say that the Hutzin go far down, and there is no need to decree (surely he notices)!

Question: However, according to Ravina, it is difficult. He connotes that because Sukah is mid'Oraisa, it is Pasul due to "if you do Kalishah..."!

Answer: There, we discuss if there are many Hutzin that can easily stay up through support.

Explanation #2: Here, if you do Kalishah, there is more sun than shade through Kalishah alone, and the Sechach above 20 joins [to make more shade than sun. Therefore, Version #1 disqualifies];

And according to Version #2, [what is above 20] is not considered Pasul Sechach so much, since the Sechach is Kosher, if it would be below 20.

Question: Regarding Hutzin, we say "if not, it is Pasul", and according to Version #2 here, we are Machshir even if there is more sun than shade!

Partial answer: According to Version #1, it is fine.

Answer: There is more reason to disqualify regarding Hutzin. Since the top and bottom are connected, if you do Kalishah, everything will fall.

Assertion: The text does not say Rav, for Rav learns from Pesach ha'Heichal. Its gap was 20. (Since here the gap is less than 20, Rav would be Machshir!)

Implied question: It says in Sukah (4a, that if a Sukah was taller than 20), and Hutzin descend within 20... (According to Rava, it suffices if they descend to 20!)

Answer: This is not precise. Because it mentioned [that the Sukah is] above 20, it says [that Hutzin descend] within 20. Really, it means the Hechsher of 20 (they descend to 20, so the gap does not exceed 20).

Implied question: The Amah of the Heichal was six Tefachim (4a. We allow a Mavuy only 20 Amos of five Tefachim!)

Answer #1: Here [Rav Papa] discusses according to Rava, who holds below that also the Amah of Mavuy has six Tefachim.

Implied question: [Rava holds that] the Amos of Mavuy are sad (without spaces between the fingers)!

Answer: Perhaps also the Amos of the Heichal are sad.

Answer #2: Even according to Abaye (who holds that the Amah of Mavuy has five Tefachim, the Heichal) is a mere Siman about [the number of] Amos;

In any case, [Rav Papa] brings that just like the gap of the Heichal is 20 of its Amos, so too a Mavuy (its gap is 20) of its Amos.

Explanation: It is Mashehu more than four [Tefachim], for there is no Pesach less than four, and if it is not Mashehu more than four, the length does not exceed the width, and it is not permitted through a Lechi or Korah, like we say below (5a).

Implied question: Abaye himself holds below (5a) that the [minimal] length of a Mavuy is four Amos!

Answer: Here Abaye discusses according to Rav Nachman. He himself disagrees.

Question: A Mishnah in Kil'ayim (4:4) teaches that if a fence was breached up to 10 Amos, it is like a Pesach (opening). If [it was breached] more than this, opposite the breach is forbidden!

Answer: [Rav Nachman] means that most Amos [of Kil'ayim, it is a stringency to say that they have six Tefachim].

Implied question: Rabanan agree that it is not a Kerem when if we ignore those in the middle, there will not remain two [vines] opposite two, and one in back of them like a tail!

Answer: Abaye discusses only Amos mentioned explicitly, but not Amos inferred from [Chachamim's] words.

Explanation: We do not discuss those that are written, e.g. the Amah of the Yesod and of the Sovev.