According to the Washington Post there are no definitive accounts of what the CIA told Nancy Pelosi about the use of Enhanced Interrogation Techniques (EIT). This is good for Nancy and it is good for the CIA. Really if open warfare does break out between the two not only would I root for the CIA but I would think they will win.
One of the major reasons is that if you go to or give a very sensitive briefing there won't be a great deal written down. If you do take notes they become working papers and must be classified, reviewed and stored. Been there and done that and it is always best with this sort of stuff to maintain minimum written papers. Electronic media is even worse and it is so easy to use. I will bet, though, that somewhere in Langley is a definitive account of what was said by whom at the briefings and it will be revealed when necessary.
Nancy needs to go talk to Scooter Libbie and the Plames to see what kind of fire she is playing with, and realize that the CIA will even sacrifice their own to protect themselves.