In the previous section, we assumed that the players interpret an opponent’s deviation from expected play in an extensive game (e.g., deviation from the backward induction path) as an indication that that player will choose “irrationally” at future decision nodes. However, this is just one example of a belief revision policy. It is not suggested that this is the belief revision policy that players should adopt. Stalnaker’s central claim is that models of extensive games should include a component that describes the players’ disposition to change their beliefs during a play of the game, which may vary from model to model or even among the players in a single model: