I think you have the right idea Jondas, but the wrong answer...
If you ask the lying door, he will say that the other door will lie, if you ask the truth door, he will say that the other door will lie.
What you have to do is ask the door "If I ask the other door if you would lie to me will he say yes?"
The lying door will have to say no
The truth door would say yes, so the door that answered yes is the truth door!
Even if it does earn me a paddling from Rukya! (I should be so lucky!)
I remember that the logic I thought while answering sounded right, but yours seems to be the correct one Blue
. And somehow I think you were after that paddling from Rukya anway :p