If blue told the truth then red would be lying. Blue would say no to the castle being behind the red door (red would lie and say blue said yes) because the door to the castle is behind blue.
If blue lied then red would be the one to tell the truth. Red confirms that Blue would lie and say yes to the castle being behind the red door as it is behind blue.
The door to the castle is in fact behind the blue creature.
Sarah falls into the trap door and down into the helping hands and oubliette because she brags that she is getting smarter and calls it "a piece of cake." Later while she and Hoggle are running through the tunnel and runs into Jareth she makes the same mistake by calling it "a piece of cake" and so Jareth throws a curve ball by fast forwarding time before unleashing the cleaners to chase them.
In the labyrinth, everything seems possible and nothing is what it seems. You think it is easy, and it will change.
you know, she could have always asked the simplest question like. is the sky blue, or am I a girl. One of them woould lie the other would tell the truth.
If blue lied then red would be the one to tell the truth. Red confirms that Blue would lie and say yes to the castle being behind the red door as it is behind blue.
The door to the castle is in fact behind the blue creature.
In the labyrinth, everything seems possible and nothing is what it seems. You think it is easy, and it will change.