"Given the circumstances of the original position, it isrational for a man to choose as if he were designing a society in which hisenemy is to assign him his place. Thus, in particular, given the complete lackof knowledge . . . it is rational to be conservative and so to choose in accor-dance with an analogue of the maximin principle.... Moreover, it seems clearhow the principle of utility can be interpreted: it is the analogue of the La-placean principle for choice uncert