Here's a good one. Marcus has four friends who he is upset with. "Hey! One of you ate my piece of cake! I was saving that for later!" he says. His friends respond:
Jim: "I didn't eat it!"
Sue: "Neither Jim nor Patricia ate it."
Orville: "I didn't eat it, either!"
Patricia: "Orville is telling the truth."
Somebody isn't telling the truth. That person is the cake gobbler. Who is it?
-
[url]http://xkcd.com/blue_eyes.html[/url]