text: are you a sex machine or a dummy? check this out here!? there are two rooms that are not connected with each other by a window or something else.   there are three switchers in the first room, and three lamps in the second. each switcher in the first room corresponds only to the one and unique lamp in the second, though you do not know to which one.   initially you are in the room with swithers. decide what you should do here (because you are not allowed to come back), so that after you appear in the room with lamps, you will know to what lamp each swither corresponds.  ----------------------------------------- the problem has a trivial solution. the question is how soon you will find it. please do not post unrealistic solutions. flick #1 on for 15 mins.  turn it off.  flick #2 on.  go into the next room.  warm one is #1.  on is #2.  off is #3.  edit: to correct spelling.