 Of course, any improper model can misfire. A rule of thumb shared by people the world-over is to not let other people take advantage of them. While this rule works most of the time, it misfires in the ultimatum game (Güth, Schmittberger, &amp; Schwarze 1982). The ultimatum game is a two-player game in which one player, endowed with a sum of money, is given the task of splitting the sum with another player who may either accept the offer—in which case the pot is accordingly split between the two players—or reject, in which case both players receive nothing. People receiving offers of 30 percent or less of the pot are often observed to reject the offer, even when players are anonymous and therefore would not suffer the consequences of a negative reputation signal associated with accepting a very low offer. In such cases, one might reasonably argue that no proposed split is worse than the status quo of zero, so people ought to accept whatever they are offered.