It's a real shame that "prisoner's dilemma" caught on as the name for this. Seems to really confuse people since it brings in a lot of baggage about real prisoners in real situations that only serves to confuse matters compared with the logic game itself.<p>As a result this page sets up the standard version, then writes many sentences telling you why this isn't like a normal situation and you should try to ignore all you know about how people would act in this situation.