Since this is an introduction, you should emphasize that the prisoner’s dilemma is about utilons and not years in jail or dollars or whatever. This is usually approximated by indicating that the two agents are perfectly self-interested and don’t care about the other player at all, but people tend to reject this for one reason or another. In any case that is the point of Eliezer’s essay The True Prisoner’s Dilemma, so you could link to that as well.
Since this is an introduction, you should emphasize that the prisoner’s dilemma is about utilons and not years in jail or dollars or whatever. This is usually approximated by indicating that the two agents are perfectly self-interested and don’t care about the other player at all, but people tend to reject this for one reason or another. In any case that is the point of Eliezer’s essay The True Prisoner’s Dilemma, so you could link to that as well.