  The issues about intention just canvassed are an instance of a more general project of understanding the nature of our mental states by understanding the normative requirements that apply to them. Just as some philosophers attempt to illuminate the nature of belief in a way that will be profitable for epistemology and the philosophy of mind by making normative claims about it—for example by claiming that belief ‘aims at truth’ (Velleman 2000, Shah 2003)—many philosophers interested in agency have become increasingly hopeful that a thorough investigation of the norms on intentions will result in important conclusions for other areas of inquiry. One guiding thought of Gideon Yaffe’s ambitious Attempts (2010) is precisely that an adequate account of the normative commitments of intention will have a great deal to tell us about how the criminal law ought to be structured.