You're in a room with two doors one door leads to nothing and the other one leads outside one door always tells the truth and the other always lies you get one question to ask one door what would you ask to figure out which door to take to get outside

Does this lead to the outside? After you get the answer, open the door.

To figure out which door leads outside, you can ask either door the following question: "If I were to ask the other door which door leads to the outside, what would it say?"

Here's how it works:

1. Assume that one door always tells the truth and the other always lies.
2. Let's consider both scenarios:

a) If you ask the truthful door, it will truthfully tell you what the lying door would say.
b) If you ask the lying door, it will lie about what the truthful door would say.

3. Now, let's analyze the responses:

a) If door A is the truthful door and door B is the lying door:
- If you ask door A, it will tell you that door B would point to the wrong door.
- If you ask door B (the lying door), it will lie and also say that door B (itself) would point to the wrong door.

So, regardless of which door you choose, they both point to the door that leads to nothing.

b) If door B is the truthful door and door A is the lying door:
- If you ask door A (the lying door), it will lie and say that door B (the truthful door) would point to the wrong door.
- If you ask door B, it will truthfully tell you that door A (the lying door) would point to the wrong door.

In this case, regardless of the door you choose, they will both point to the door that leads outside.

Since the responses from both doors are identical in the scenario where door B is the truthful door, you can conclude that door B is the door leading outside.