- Mar 10, 2011
Thanks River....This method works without you ever knowing which guard tells the truth and which one lies.
Think about it. You don't know which is which, but they know each other. You're not asking them which door holds the prize, but which door will the other guard says holds the prize. If you ask the truthful guard which dooe will the other guard say is the prize door, the truthful guard will tell you the truth about the other guard's lie. Vice versa the lying guard will lie about the other guard's truth. Either way you get the same answer.
Sleep on it, okay.