When is a Goal Rational

Abstract. In decision theory goals are usually taken as given inputs to the analysis, and the focus is on finding the most efficient means to achieve the goals. But where goals are set with the purpose of achieving them, it is important to know what properties they should possess in order to be suc-cessful (or achievement-inducing). Four such properties (or rationality cri-teria) are discussed, namely that goals should be precise, evaluable, approachable and motivating. Precision and evaluability are epistemic properties that concern what the agent may know. Approachability is an ability-related property that concerns what the agent can do. Motivity is a volitional property that concerns what the agent wants to do. Goals may satisfy the rationality criteria to a greater or lesser extent. Some goals are achievement-inducing mainly because they guide action towards the end-state well, others mainly because they motivate the agent to act towards the real-ization of the end-state.