Shmuel's daughters: The ones who knew what to say to the Rabbis

These girls testified a Rabbinical court that they had been kidnapped but they had not been sexually active. The Rabbis accepted this and they were allowed to marry. They were their own witnesses and relied on the principle of 'the mouth that forbids, is the mouth that permits.' - they did not have to incriminate themselves, but because they volunteered the information that they were kidnapped and thus raising a suspicion if they had been sexually active, they can be trusted when they said that they were still virgins. 

The rabbis later realised that they were daughters of a scholar, and therefore they knew the legal principal and how to play the system. They were still allowed to marry.

Who knows what really happened to these women during captivity? It doesn't seem to be relevant... the important thing is to know how to tell the story so they can move on with their life now that they are free. 

(Ketubot 23a)