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)

Larry Alexander and Peter Westen each critically examine different topics from my recent collection of essays, The Philosophy of Criminal Law. Alexander focuses on my “Rapes Without Rapists,” “Mistake of Law and Culpability,” and “Already Punished Enough.” Westen offers a more extended commentary on my “Transferred Intent.” I briefly reply to each critic in turn and try to extend the debates in new directions.