It is widely held that theories of well-being must satisfy the criterion of descriptive adequacy. According to the criterion, an adequate theory of well-being must optimally fit our everyday experiences and judgments relating to well-being. This article argues that there is no such criterion that constrains theories of well-being. First, it examines in detail the reasons for which the criterion was originally introduced. Second, it argues against the criterion, on the grounds that well-being is essentially normative and normative theories more generally are not subject to any such constraint. Third, it considers two objections relating to reflective equilibrium and thick normative concepts. Finally, it explores the implications of rejecting the criterion for evaluating theories of well-being and for integrating the philosophy and science of well-being. A positive lesson of the article is that taking the normativity of well-being seriously from a meta-ethical perspective has implications for first-order theorizing about well-being.