A woman who was captured [by idolaters] may eat terumah, [these are] the words of R' Dosa. But the Sages say: There is [a situation in which] a captured woman may eat terumah and there is [another situation in which] a captured woman may not eat terumah. How so? If a woman said, “I was captured but I am pure,” she may eat terumah, because the very mouth that has forbidden is the mouth that has permitted. But if there are witnesses [who testify] that she was captured, and she says, “I am pure,” she may not eat [terumah].