(Beraisa - R. Yehudah): At the time of decrees, we used to take the Sefer [Torah] and ascend from Chatzer to roof, and from roof to another roof, and we would sit and read [on the roof], and no one said a word [that one may not transfer like this].

Chachamim: A time of decrees is different (you cannot bring a proof from there).

(Beraisa - Rebbi): We learned from R. Shimon in Teko'a, and we would bring to him [on Shabbos] oil and a towel, and we entered from Chatzer to roof, from roof to Karfef, from Karfef to Karfef, until we reached the Karfef near the bathing spring. We descended and immersed in it.

It is found that there is a four-way argument. [R. Meir holds that] all roofs of the city are one Reshus. Chachamim say, each is a separate Reshus. R. Yudan says, a Chatzer and roofs are one Reshus. R. Shimon says, roof, Chatzer and Karfef are one Reshus for Kelim that were Shoves in them, but not for Kelim that were Shoves in the house.

(R. Yochanan): This is when they were not Me'arev, but if they were Me'arev, the Chatzer becomes like houses, and the roofs are their own Reshus.

(R. Ze'ira): The same applies whether they were Me'arev or they were not Me'arev.

Question (against R. Yochanan - Mishnah): [They are all one Reshus...] but not for Kelim that were Shoves in the house;

If they were not Me'arev, is it needed to teach this?! One may not take out from the house. All the more so it is forbidden to take to the roof!

Answer (R. Bun bar Kahana): No - [R. Yochanan means that] they were not Me'arev together, but each was Me'arev by itself. Even so, [they are not one Reshus] for Kelim that were Shoves in the house.

(Rabanan of Kisarin citing R. Yosi bei R. Bun): Shmuel holds like Rav, and both argue with R. Yochanan;

(Mishnah): All roofs of the city are considered one Reshus.

Shmuel says, this is up to Beis Sa'atayim. Rav says that we carry in them even a [Beis] Kor or two Korim.