RabidusUnus said:
He won't hang him.
A real paradox:
There is a man, and he walks up to you and says, "Everything I say is a lie."
Is he telling the truth?
No he isn't. But he's just lying now.
If he were telling the truth, then what he's saying now is nullifying his actions.
But if he doesn't lie all the time, he can lie sometimes. So now he is lying.
OT: The hangman hangs only those who lie, so:
1. the dude isn't lying but the hangman can't fulfill his wish.
2. the dude didn't came to be hanged, but by saying he did, he lied. So the hangman will kill him.
In my opinion, there are no real possible paradoxes, just good logic games, or problems that are wrong, or missing something.