When under torture, the only thing the person can imagine is making it stop, so they say anything, do anything to make it stop. That's why psychological mind games work much better than anything physical, although they can fall into the same trap of the person saying anything to stop the mind games.
This is one of torture's worst failures, and why it is rarely used when truly seeking the truth, because you rarely get that by it's use.
Nightowl >8#