 The options or prospects in Savage’s theory are similar to lotteries, except that the possible outcomes do not come with probabilities but rather depend on whether a particular state of the world is actual. Indeed, the primitives in Savage’s theory are  outcomes[4]  and states (of the world). The former are the good or bad states of affairs that ultimately affect and matter to an agent, while the latter are the features of the world that the agent has no control over and which are the locus of her uncertainty about the world. Sets of states are called events. This distinction between outcomes and states serves to neatly separate desire and belief: the former are, according to Savage’s theory, the target of desire, while the latter are the target of belief.