Alright here is the answer:
Try and follow my logic....it is impossible to figure out which angel is the lier and which one is not! It is also impossible to figure out which door leads to heaven unless you ask a certain type of question. The type of question i am talking about is the kind where you ask one angel about what the other angel would say if i asked him " bhlah". There is a certain truth to a question of this type because no matter what you ask, you will get a lie. There are only two possible scenarios:
- Either you are asking the truthful angel about what the lying angel would say...Meaning the truthful one will tell you exactly what the lying angel would say.!
- Or you are asking the lying angel about what the truthful angel would say...Meaning the lying angel will tell you the exact opposite of what the truthful angel would say!.
SO, Either way you will get a lie. So they key is you are sure you are going to get a lie so now lets focus on the question. If you ask the question "What will the other angel say if I ask him which door is he standing in front of ."
YOU WILL ONLY GET TWO POSSIBLE ANSWERS:
-IF the angel you are asking about is standing in front of the door to hell, the answer you will get is heaven!
-IF the angel you are asking about is standing in front of the door to heaven, the answer you will get is hell!
So go to the door that leads to "hell", and you will end up in heaven!