How Do I Figure Out Which Door to Choose From? A computer game involves a knight on a quest for treasure. At the end of the journey, the knight approaches two doors.

The left door has a sign saying "One of these doors leads to a ferocious dragon!" and the right door has a sign saying "Behind this door is treasure, and behind the other door is a ferocious dragon!"

A Servant informs the knight that one of the doors is true, and the other is false. Use Indirect Reasoning to determine which door the knight should choose. Explain your reasoning.

Where do I start? I'm confused on where to begin and the steps to figuring out the right door...
Suppose the second door is being truthful. Then the first door has a dragon behind it. So, there is a door with a dragon. So the first door is being truthful too. This contradicts the servant.

Hence the second door is lying, but the first door is telling the truth. Unfortunately, as the questions is set up, this means the statement "door 2 has treasure and door 1 has a dragon" is false. This could, however, be false if door 2 was safe, but there was no treasure. So it seems to me like there still could be a dragon behind door 1, provided there is no treasure behind door 2. Or it can be because there is a dragon behind door 2.
Another solution would be for both doors to lead to a dragon, which would make the left door true and the right door false.