So if you don't know anything, but are a supporter of the enemy, you will hold out, for fear of accidentally hitting on the truth If you are totally uninvolved, you will talk fairly rapidly, and tell lies without worrying about accidentally hitting the truth. If you are genuinely in the know you will talk fairly rapidly too, and your lies will avoid accidentally telling the truth.

In both the latter cases innocent people will be identified as guilty in the course of the lies. They will then be picked up and interrogated, giving rise to more lies which will lead to more innocent people being picked up...
......................................

An article worth reading here, in an online magazine called Slate - How torture begets even more torture

A taster quote: "In 1968, a soldier in the 1st Cavalry Division was court-martialed for waterboarding a prisoner in Vietnam. In fact, the practice was identified as a crime as early as 1901, when the Army judge advocate general court-martialed Maj. Edwin Glenn of the 5th U.S. Infantry for waterboarding, a technique he did not hesitate to call torture."