Here's a riddle for you:
You are standing in a room with 2 doors. You know that one leads to Heaven, and the other to Hell, but you do not know which door is which. There is no other way out, and once you open a door, you must enter it. Between the two doors are two computers: one always lies, and the other always tells the truth. You do not know which computer is which.
The challenge? You can ask one question of one computer to determine which door leads where. What question will give you that answer beyond the shadow of a doubt?

C'mon, guys! Somebody give it a shot.

I am SO sure this is not the right answer but I'd skip the computers altogether. I'd just feel the doors and if one was hot I'd go to the other one!

But now that I'm thinking it through, I might ask one of the machines: "If I want to go to Heaven should I enter the door on the right or in the middle?" If I'm asking the liar computer and it replies "right" then I'd know to go to the left one since there is no middle door. But, hmmm..., that wouldn't quite work since if it says "middle" it might be lying about the right door, too. Puzzling!

I think I confused even myself on that reply... !

I think you ask one of the computers something like “If I asked you ‘Does the door on the right lead into Heaven?’, would you say ‘Yes’?”

Suppose the right-hand door really does lead into Heaven. In that case, the truth-teller naturally says “Yes.” If the liar had been asked ”Does the right-hand door lead to Heaven?”, it would have said “No”: so it must also answer you question with “Yes” in order to lie.

If the right-hand door goes to Hell, the truth-teller says “No.” If the liar had been asked simply “Does the right-hand door go to Heaven?”, it would have said “Yes”: therefore it must also say “No” to your question.

So, no matter which computer you ask, you can safely use the right-hand door if the answer is “Yes” and the left-hand door if it’s “No” – or the other way round, of course, if you think you’ll prefer the company in Hell.

There is another way

Let call the computers Computer1 and Computer2

Ask computer1 this question

"If I was to ask Computer2 which door lead to heaven what would the answer be?"

You then would take the door opposite to the answer.

If computer1 is the truthful one then computer2 will lie about which door goes to heavan.

If the computer1 is a liar then it will answer the opoosite door to which the truthful door would answer.

cheers

Craig

Congratulations to craigal, He got it! Thanks for participating, everyone.