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I heard before (I think in the name of the Rogatchover) that there is one Amora in every masechta of Talmud that does not appear in any other masechta.

Is there a source for this, and is there a list somewhere of each masechta's unique Amora?

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That legend of the Rogachuver has never been verified onthemainline.blogspot.com/2007/01/… – Double AA Feb 13 '14 at 4:10
@DoubleAA I would think it would be a pretty easy one to test, with computers. – Y ez Feb 13 '14 at 4:10
Computers won't help you decide if he said it or not... – Double AA Feb 13 '14 at 4:13
FWIW Tamid has [רבי ינאי בר נחמני]([g tamid 29a]) – Double AA Feb 13 '14 at 4:23
@DoubleAA Computers could confirm the veracity of the rumor. I'm not so much interested in who said it. My question is pretty clear about what info I'm looking for. – Y ez Feb 13 '14 at 4:40
up vote 3 down vote accepted

The attribution to the Rogetchover is, according to Rabbi Bechhofer, "an unverified legend related in the Yeshiva world."

Something very much like this was written by the Meiri in his introduction to Pirkei Avos (starting here), where he goes through each Masechta listing all of the tannaim that appear there for the first time.

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