Chulin 128 חולין דף קכח

So we're discussing basar, or avir, medodol of an animal, and Ramein Rav Shimon argued with Mishnah if shchita of the animal is makshir, the medodol part.

Ramein Rav said yes, and Rav Shimon said no.

And we already had two explanations there, makhloikas, rabba, and abaye.

Rabbi Yechanan had agreed to abaye, but it's really the same thing.

And now we move on to four more.