The “Cash Cab” Logic of Elizabeth Moon

I was watching an episode of “Cash Cab” the other day: The Discovery Channel game show where unwitting passengers find themselves in the titular vehicle, answering a series of trivia questions for cash prizes.

One of the questions posed by host/driver Ben Bailey was: “If you’re drinking through a six pack of beer, and you’re cracking open the penultimate can, which can of beer are you drinking?” The riders put their heads together, and one young woman who appeared to be the brains of the group said, “Well…a ‘pen…tagram’ is a five pointed star. And the pen…tagon has five sides. So the pen…ultimate can must be the fifth can!”