Superrationality
In economics and game theory, a participant has superrationality (or renormalized rationality) if the participant is perfectly rational (maximizes utility) but assumes that all other participants are also superrational, and that any superrational participant will always come up with the same strategy as any other superrational participant when facing the same problem. Applying this definition, a superrational player in a two player prisoner's dilemma will cooperate while a rationally self-interested player would defect.