gudskepteacal wrote:My neighbor just looked it up on her Wiki app with her smartphone. I'm such a dumb*#%! Sorry, I'm done now.
I didn't get it either. But the logic is so simple. Devise a question so that both guards are involved, so that no matter what you will get a lie. I think the reason I, and maybe you, didn't get it is, it seems to defy some mathematical law, in that a truth + a lie is always a lie. And I tend to think very much in mathematical terms. So the answer eluded me, because it just doesn't add up properly. Mathematically, a truth + a lie should equal zero.
I know that sounds like a stretch of an excuse but I bet both you and I thought of the correct answer but immediately dismissed it, not realizing the viability in something so lopsided as 1 truth + 1 lie = 1 lie.
So, I guess you found out. The question is, "What exit will the other guy say is the safe exit?" Whichever one the guard points to, is the exit to avoid.