Solution:
A good question could be Is the liar in front of the door to freedom ?- If you ask it to the liar and if he is in front of the door to freedom, he will say NO.
- If you ask it to the truthful man and if he is in front of the door to freedom, he will say NO.
- If you ask it to the liar and if he is in front of the door to jail, he will say YES.
- If you ask it to the truthful man and if he is in front of the door to jail, he will say YES.