In ‘Excusing Mistakes of Law’, Gideon Yaffe sets out to ‘vindicate’ the claim ‘that mistakes of law never excuse’ by ‘identifying the truth that is groped for but not grasped by those who assert that ignorance of law is no excuse’. Yaffe does not offer a defence of the claim that mistakes of law never excuse. That claim, Yaffe argues, is false. Yaffe’s article is, rather, an effort to assess what plausible thought might be behind the idea that mistakes of (...) law often should not excuse. (Yaffe is interested in more than just the descriptive claim that in Anglo-American legal jurisdictions mistakes of law routinely do not, in fact, excuse.) More particularly, Yaffe is interested in what plausible normative justification there might be for this asymmetric pattern: -/- Asymmetry: False beliefs about non-legal facts often excuse, but false beliefs about the law rarely excuse. -/- Yaffe offers a complex argument in support of Asymmetry. This paper is organised around my reconstruction of Yaffe’s argument. I argue that Yaffe’s argument does not succeed, but that his argument provides a template for an argument that could succeed. (shrink)

When does a defendant not deserve punishment because he is unaware that his conduct breaches a penal statute? Retributivists must radically rethink their answer to this question to do justice to our moral intuitions. I suggest that modest progress on this topic can be made by modeling our approach to ignorance of law on our familiar approach to ignorance of fact. We need to distinguish different levels of culpability in given mistakes and to differentiate what such mistakes may be about. (...) I discuss the advantages and disadvantages of this approach with special attention to how to contrast offenses from defenses. The alternative I tend to favor probably should not be implemented in existing penal codes. As a result, we are likely to remain dissatisfied with the decisions made by our criminal justice system about the exculpatory effect of ignorance of law. (shrink)

In most common-law and civil-law jurisdictions, mistakes of law do not excuse. That is, the fact that one was ignorant of the content or requirements of some law does not excuse violations of that law. Many have argued that this doctrine is mistaken. In particular, many have argued that if an individual’s ignorance or false belief is blameless, if she held the false belief reasonably, then she ought to be able to use that ignorance as an excuse for violating the (...) law. It is much harder to find defenders of the doctrine, despite its prevalence. Pragmatic considerations are occasionally offered on its behalf, but these are generally not impressive. In this paper, I consider a more direct kind of justification for the doctrine, one that attempts to identify something more immediately normatively objectionable about being ignorant of the law. In particular, I consider an argument that suggests that legal ignorance is more like moral ignorance than like nonmoral ignorance and maintains that even nonculpable moral ignorance does not excuse. (shrink)