I do not want to itemize the various fallacies that are commonly offered in seeking to justify cooperation in the Prisoner's Dilemma. In brief, they mostly proceed by arguing that the Prisoner's Dilemma is really some other game in which cooperation is not irrational. Game Theorists do not object to some other game being analyzed: only to the analysis of some other game being offered as an analysis of the Prisoner's Dilemma.

Ken Binsmore - in a critique of Gauthier's "Morals by Agreement"