A precise formulation of the Doomsday Argument requires the Bayesian interpretation of probability. Even among Bayesians some of the assumptions of the argument's logic would not be acceptable; for instance, the fact that it is applied to a temporal phenomenon (how long something lasts) means that N's distribution simultaneously represents an "aleatory probability" (as a future event), and an "epistemic probability" (as a decided value about which we are uncertain). The U (0,1] f distribution is derived from two choices, which despite being the default are also arbitrary: The principle of indifference, so that it is as likely for any other randomly selected person to be born after you as before you.