That monk one was good, Kejero! Well done!
As for Barta's: [color:"#324372"]"If I asked the other guy if this was the door to paradise, what would he say?"
If it is the door and the guard lies, he'd say "No."
If it is the door and the guard is honest, he'd say "No."
If it isn't the door and the guard lies, he'd say "Yes."
If it isn't the door and the guard is honest, he'd say "Yes."
So if he says "No" you know it's the door to paradise. If he says "Yes", you know it's the other door.
The question forces both a truth plus a lie, leaving nothing left to chance.[/color]