Input Junkie

I can't point you to any sources but I think it's a bit of a non question. Police interrogate thousands of criminal suspects every day. Intelligence officers are trained to interrogate POWs who have full Geneva protection. I don't need to know how to interrogate without torture to know that it can be and is done every day by the competent professionals. I don't need to be able to tell you exactly how to drive a bus to know that driving it off a cliff is not appropriate.