Right; the point is that when you're the interrogator holding your 'rubber hose', when do you know to stop asking for more passwords? There might be 2, there m

Right; the point is that when you're the interrogator holding your 'rubber hose', when do you know to stop asking for more passwords? There might be 2, there might be 20. Your suspect will put up the same resistance (theoretically) for each password. Edit: of course, sucks for the suspect if the interrogator doesn't consider their life valuable.