Benefits of torture?

John McCain once again makes a good argument: Torture's Terrible Toll. Sometimes the simplest reasons are the best:

I was once physically coerced to provide my enemies with the names of the members of my flight squadron, information that had little if any value to my enemies as actionable intelligence. But I did not refuse, or repeat my insistence that I was required under the Geneva Conventions to provide my captors only with my name, rank and serial number. Instead, I gave them the names of the Green Bay Packers' offensive line, knowing that providing them false information was sufficient to suspend the abuse. It seems probable to me that the terrorists we interrogate under less than humane standards of treatment are also likely to resort to deceptive answers that are perhaps less provably false than that which I once offered.