Its really not that hard

one says four, the other says "window", what do you do then?

That's not the point, the point is to figure out which door leads you to what you want and with one leads you to
Doom, you only get one question and you've got to figure out which one you can trust the answer from as well, the wording of your question ultimately matters

I love that movie! (The labrynth)

That is smart idea :O

Well usually you have to phrase your questions in a yes or no manner.