one argument i like for keeping torture info secret: revealing our "interrogation techniques" helps the terrorists. um, how, exactly? do you think the notion that you might be waterboarded would help you withstand waterboarding when the time came? the spanish inquisition had a better idea: show potential blasphemers your amazing torture devices, and this will keep their inmost hearts orthodox. but i don't think anyone was arguing that knowing we were going to cut you up and pour molten lead into the wounds would help people resist ratting on their fellow heretics.