Kesubos 1:9-10

Kesubos 1:9

Let’s say that an unmarried woman was pregnant, she was asked about the nature of her unborn child, and she replied that the father is a kohein. Rabban Gamliel and Rabbi Elezer say she is believed (and she and her child, if a girl, may marry a kohein). Rabbi Yehoshua says we do not rely on her words. Rather, the presumption is that the man was a Gibeonite or a mamzer (rendering her and a daughter unfit to marry a kohein) and the burden of proof is on her to demonstrate otherwise.

Kesubos 1:10

Rabbi Yosi related an incident in which a girl went to draw water from a spring and was raped. Rabbi Yochanan ben Nuri ruled that if most people in the city are fit to marry kohanim, we may assume her attacker is of the majority and does not affect her ability to marry a kohein.