that torture is not a reliable method for getting information. How do you really know that the stuff a guy is screaming is true? It could very easily be diversion if the guy has a further purpose or if the guy is a pawn and was given false information. Torture had people screaming that they were witches who kissed the devil and cast wicked spells. How reliable is a method that can lead to that kind of crap? All it has a strong probability of doing is dehumanizing the torturer.
The good interrogators use manipulation, confusion, fatigue, and disorientation to ease out little slips. Some jackasses consider that to be torture too. But I feel torture has more to do with pain and threats. Maybe they do need to define what exactly it is sometime.