How is the determination made that the subject does have the sough-after information. Because the subject may give what ever information the interrogator is biased to receive.

The following pdf "http://www.cgu.edu/pdffiles/sbos/costanzo_effects_of_interro... makes the case much more eloquently than I can in this comment section. Reading the "Conclusion: Consequences and Alternatives" section is very instructive.

Also the guardian article "http://www.theguardian.com/science/the-lay-scientist/2010/no... is very instructive.

Furthermore, I feel using torture is inherently immoral and we should strive to achieve a better world even when we know that our adversaries are not playing by the rules.