ABSTRACT
The theory of team reasoning was developed separately by Robert Sugden and Michael Bacharach. In a similar manner, if the best team profile in the prisoner's dilemma is and the common knowledge conditions are fulfilled, then team reasoning can predict that players will choose cooperate. For Sugden, in contrast, both the step from noticing to group identification and the step from group identification to team reasoning are opportunities for choices. Among economists, patterns of consistent behavior provide evidence of rationality and of the agent's mental states which caused the behavior; or, for more philosophical theories of rational choice, which relate it to practical reasoning, given people's beliefs and desires one can identify what behavior would be rational. An individual is said to group identify if she conceives of herself as part of a team, where the group is a unit of agency, acting as a single entity in pursuit of some single objective.
