@Rational Poster
It's often said that negative assertions cannot be disproven, because "we don't know what we don't know." If we asked you to prove conclusively that invisible pink unicorns don't exist, you would be unable to do so because (1) they're invisible, and (2) just because you've never seen one doesn't mean they don't exist. Likewise, you would be unable to conclusively prove that you've never raped anyone. After all, how do
we know that you didn't do it?
That's why, in the real world, we have to weigh facts as they are known, in light of experience and common sense. And when 4 witnesses say they "have no recollection" of specific people, events, locations, times, and other facts that would corroborate a "victim" witness's testimony, experience tells us that the victim witness is wrong (whether she's lying or mistaken). In fact, that's effectively a shutout.