(Mishnah - R. Yehudah): We do not establish one to be a Kohen based on one witness.

R. Elazar: This applies when there are protests. When there are no protests, one witness suffices.

R. Shimon ben Gamliel citing R. Shimon ben ha'Segan says, we establish a Kohen through one witness.

(Gemara - R. Chiyah citing R. Yochanan): There is no protest less than two.

Question (R. Bun bar Chiyah): What is the case?

If he was established through one witness, he can be removed [from his Chazakah] through one he was established through two witnesses, even many cannot remove him! (Amidst contradictory testimony, we leave him in his Chazakah.)

Answer (Rav Huna): [You assume] like Rabanan there (in Bavel, that amidst contradictory testimony, we retain the status quo.) However, [R. Yochanan holds like] Rabanan here (Eretz Yisrael), and like Rav Nachman bar Yakov - just like we establish him through two, so we remove him through two.

(Mishnah): If Nochrim took a woman captive for money (they intend to charge ransom to release her), she is permitted to her husband;

If she was taken for a capital offense, she is forbidden to her husband.

If a besieged city was captured, all wives of Kohanim are Pasul [to their husbands];

If they have witnesses, even a male or female slave, they are believed;

A person is not believed about himself.

R. Zecharyah ben ha'Katzav (a Kohen): I swear that my wife didn't leave my side from the time that the invaders entered Yerushalayim until they left!

Chachamim: A man cannot testify for himself.

(Gemara - Mishnah): R. Yosi ha'Kohen and R. Zecharyah ben ha'Katzav testified about a girl who was taken for collateral for a loan in Ashkelon. Her family distanced themselves from her, even though the witnesses about her abduction said that she was not secluded and not defiled. (Chachamim said, if you believe the witnesses that she was taken for collateral, believe them that she was not secluded! If you do not believe them that she was not secluded, do not believe them that she was abducted!)

Question - Inference: [Chachamim were Machshir] because the witnesses testified that she was not secluded and not defiled, but if the witnesses did not testify that she was not secluded and not defiled, no! (Our Mishnah says that if she was taken for money, she is permitted to her husband!)

Answer (R. Lazar): Taking for collateral is different, for many consider this permitted. (Therefore, Chachamim were stringent to forbid her unless there is testimony, so people will not let them take women - SEFER NIR.)