Pesachim 100A

דילמא משבשתא היא.

Perhaps this baraita is corrupted, and therefore it cannot serve as the basis of an objection.

אמר ליה מרימר, ואיתימא רב יימר: אנא איקלעי לפירקיה דרב פנחס בריה דרב אמי, וקם תנא ותני קמיה וקיבלה מיניה. אי הכי קשיא! אלא מחוורתא כדרב הונא.

Mareimar said to him, and some say it was Rav Yeimar: I happened to come to the Festival lecture of Rav Pineḥas, son of Rav Ami, and the tanna who recited mishnayot stood up and taught this baraita before him, and he accepted it. This incident proves that the above version of the baraita is accepted and considered accurate. If so, the aforementioned objection to Rav Pappa’s opinion on the basis of the baraita remains difficult. Rather, Rav Pappa’s answer is insufficient, and it is clear that the Mishnah must be understood in accordance with the explanation of Rav Huna. In other words, the Mishnah is in accordance with the opinion of R' Yosei, who maintains that although one may eat until dark on the eves of Shabbat and other Festivals, it is prohibited to eat on Passover eve from shortly before the lesser minḥa until nightfall.

ולרב הונא מי ניחא? והאמר רבי ירמיה אמר רבי יוחנן, ואיתימא אמר רבי אבהו אמר רבי יוסי בר רבי חנינא: הלכה כרבי יהודה בערב הפסח, והלכה כרבי יוסי בערב שבת.

The Talmud asks: And according to the explanation of Rav Huna, does it work out well? But didn’t R' Yirmeya say that R' Yoḥanan said, and some say that R' Abbahu said that R' Yosei bar R' Ḥanina said: The halakha is in accordance with the opinion of R' Yehuda with regard to the eve of Passover, and the halakha is in accordance with the opinion of R' Yosei with regard to Friday?

הלכה כרבי יהודה בערב הפסח, מכלל דפליג רבי יוסי בתרוייהו!

The Talmud infers from the above statement: From the fact that it was necessary to say that the halakha is in accordance with the opinion of R' Yehuda with regard to the eve of Passover, this proves by inference that R' Yosei disagrees with regard to both cases, both the eves of Shabbat and other Festivals, as well as Passover eve. Consequently, it is impossible to ascribe to the opinion of R' Yosei the Mishnah’s prohibition against eating on the eve of Passover, as he evidently permits one to eat until dark even on Passover eve.