WHAT'S WRONG WITH THIS PICTURE? An apprentice finds the Prisoner's Dilemma in the Chicago Split.

Sometimes when you go out to a bar with friends, somebody will break out the MasterCard and start a tab for the whole group.

By the end of the night...you're much too drunk to figure out how much each person individually owes, so you just divide the whole thing up by the number of people in your group....now you're each paying the same amount.

The friend who was telling me about his night was upset that one of his friends drank the same number of $5 imported beers while the rest of the group ordered the special (usually cheap beer that officially qualifies as one step above piss...but it still gets the job done)....and I said...."Well...can you blame him? How many people were in your group?"

"Five."

There is something suspect about this story. If it's five guys, and the bill comes to $33, each tosses in a ten (perhaps somebody tosses in a twenty and takes back a ten) and the server gets a rather large tip.