Rav: (When a debt is partially repaid and a new document is drawn up with the reduced amount), the date of the first document must be written in the second one.

Shmuel: It does not need to be written.

Rav and Shmuel - Rav follows R. Yochanan and Shmuel follows R. Shimon ben Lakish.

R. Yasa citing R. Yochanan: Even though R. Yishmael praised Ben Nanas over his interpretation (see daf 175-1), the Halachah does not follow him.

Shimon bar Vava citing R. Yochanan: Even in a case of choking (see daf 175-1(g)), the Halachah follows Rebbi Yishmael.

R. Yosi: One can learn from this that if Reuven was choking Shimon in the marketplace and demanding payment of money that Reuven did not owe, if Levi came and told Reuven, "Leave him alone and I will pay the debt'', Reuven can only now collect from Levi but not from Shimon.