Game theory is based on the idea that each matrix is modeled with the assumption of complete information: that "every player knows the payoffs and strategies available to other players," where the word "payoff" is descriptive of behavior—what the player is trying to maximize. If, in the first town, the competitor enters and the monopolist is aggressive, the second competitor has observed that the monopolist is not, from the standpoint of common knowledge of payoffs and strategies, maximizing the assumed payoffs; expecting the monopolist to do so in this town seems dubious.