You are in a room with 2 doors & 2 beings. You know that 1 being will always tell you the truth & the other 1 will always lie to you. Both of them know this as well. The problem is you can not tell them apart.
You only get to ask any 1 of them just 1 question to find out which door is the correct one to get out. Both of the beings know which is the correct door for you.
What 1 question will you ask so that you may safely exit the room????
