This is my first puzzle but I hope it will work out well and that everyone can enjoy it.
While trying to get out of a dungeon, you arrive in a circular room with 5 doors at equal distances from each other. The doors are all locked, but fortunately, there is a nice guard in front of each door willing to unlock their door for you if you just ask them nicely. The problem is that only 1 of these doors is the exit while the others will send you to your certain death.
The guards are all knowing and willing to answer any questions you might ask by "yes" or "no".
Unfortunately the guards are very impatient and will only allow you to ask 4 things in total and your questions may not include multiple or conditional statements. Keep it short and sweet.
Oh yeah, one more thing, one of them always lies.
Is there a fail proof way to find the good door? If so say how you would proceed.
If not, explain why.
Read carefully what was asked of you from this puzzle.
Success can sometime be found in failure.
CONGRATULATION to Geliormth for finding the exact answer I was looking for and apologize for any mistakes or badly explained details there might have been withing my puzzle.
Please leave me comments on how you liked my puzzle and its "twists". If the twists and/or the answer were more irritating than fun, I will try to improve on that next time.