According to a famous maxim, ignorance or mistake of law is no excuse. This maxim is supposed to represent both the standard and the proper rule of law. In fact, this maxim should be qualified in both respects: ignorance and mistake of law sometimes are, and (perhaps even more often) should be, excused. But this dual qualification only reinforces the fundamental and ubiquitous assumption which underlies the discussions of the subject, namely, that the only ground of exculpation relevant to ignorance (...) or mistake of law is excuse due to lack of (sufficient) culpability. The paper challenges this consensus. I argue that, according to the best conception of justification, ignorance and mistake, including ignorance and mistake of law, could be justified. Generally, ignorance and mistake are justified when based on a rational analysis of the information the agent has and should have. The conceptual possibility of justified ignorance or mistake is demonstrated mainly with respect to ignorance or mistake of law due to reliance on the guidance of public officials or private lawyers. (shrink)

When a person acts from ignorance, he is culpable for his action only if he is culpable for the ignorance from which he acts. The paper defends the view that this principle holds, not just for actions done from ordinary factual ignorance, but also for actions done from moral ignorance. The question is raised whether the principle extends to action done from ignorance about what one has most reason to do. It is tentatively proposed that the principle holds in full (...) generality. (shrink)

The question of the psychopath's responsibility for his or her wrongdoing has received considerable attention. Much of this attention has been directed toward whether psychopaths are a counterexample to motivational internalism (MI): Do they possess normal moral beliefs, which fail to motivate them? In this paper, I argue that this is a question that remains conceptually and empirically intractable, and that we ought to settle the psychopath's responsibility in some other way. I argue that recent empirical work on the moral (...) judgments of psychopaths provides us with good reason to think that they are not fully responsible agents, because their actions cannot express the kinds of ill-will toward others that grounds attributions of distinctively moral responsibility. I defend this view against objections, especially those due to an influential account of moral responsibility that holds that moral knowledge is not necessary for responsibility. (shrink)

A rational defense of the criminal law must provide a comprehensive theory of culpability. A comprehensive theory of culpability must resolve several difficult issues; in this article I will focus on only one. The general problem arises from the lack of a systematic account of relative culpability. An account of relative culpability would identify and defend a set of considerations to assess whether, why, under what circumstances, and to what extent persons who perform a criminal act with a given culpable (...) state are more or less blameworthy than persons who perform that act with a different culpable state. (shrink)

This paper takes on several distinct but related tasks. First, I present and discuss what I will call the “Ignorance Thesis,” which states that whenever an agent acts from ignorance, whether factual or moral, she is culpable for the act only if she is culpable for the ignorance from which she acts. Second, I offer a counterexample to the Ignorance Thesis, an example that applies most directly to the part I call the “Moral Ignorance Thesis.” Third, I argue for a (...) principle—Don’t Know, Don’t Kill—that supports the view that the purported counterexample actually is a counterexample. Finally, I suggest that my arguments in this direction can supply a novel sort of argument against many instances of killing and eating certain sorts of animals. (shrink)

I attempt to describe the several costs that criminal theory would be forced to pay by adopting the view (currently fashionable among moral philosophers) that the intentions of the agent are irrelevant to determinations of whether his actions are permissible (or criminal).

Orthodox criminal law doctrine treats mistakes of law and mistakes of fact differently for purposes of both exculpation and inculpation. Kenneth Simons’ paper in general defends this orthodoxy. I have earlier criticized the criminal law’s attempt to distinguish mistakes of law from mistakes of fact, and I continue to maintain, in opposition to Simons, that the distinction is problematic.

Only paperback edition of great legal classic. Lucid, accessible coverage of liability, criminal law, torts, contracts, more, from historical perspective. New introduction by Sheldon M. Novick. Table of Cases.

Whether we understand it descriptively or normatively, the slogan that ignorance of the law is no excuse is false. Our legal system sometimes excuses those who are ignorant of the law on those grounds and should. Still, the slogan contains a grain of truth; mistakes of law excuse less readily than mistakes of fact, and ought to. This paper explains the asymmetry by identifying a principle of excuse of the form “If defendant D has a false belief that p and (...) _____, then D is excused”, which has the following feature: it is true frequently when p is a non-legal proposition, but it is false often when p is a proposition about the law. Under this principle of excuse, mistakes excuse by showing the agent to have acceptable commitments for recognizing, weighing, and responding to reasons. Many mistakes of fact show this; they show that the agent’s deliberation led to objectionable action because of faulty inputs and not to fault in the deliberation itself. Mistakes of law, by contrast, frequently indicate that the agent has faulty commitments when it comes to legal reasons; they therefore do not provide excuse under the proposed principle of excuse. It is argued that this explanation of the asymmetry between mistakes of fact and law takes us a great distance towards explaining the relevance of mental state to responsibility, an issue of great importance to moral philosophy. (shrink)

Courts and commentators have struggled for years to identify rules to explain and justify certain widely-shared intuitions about impossibility attempts, and they have proposed rules variously based upon (1) what mistakes actors make, (2) what intentions actors possess, and (3) what conduct actors perform. None of the proposals fully succeeds, however, and none is able to explain the widely-shared intuition, which underlies Sandy Kadish's inventive hypothetical regarding Mr. Law and Mr. Fact, that some attempts based upon mistakes of law are (...) just as blameworthy as attempts based upon mistakes of fact. I propose an alternative rule that, I believe, not only explains where and why people possess widely-shared intuitions regarding impossibility attempts (including regarding Mr. Law and Mr. Fact), but also explains where and why people have conflicting intuitions. I argue that widely-shared intuitions of blameworthiness and non-blameworthiness regarding impossibility attempts are a function, respectively, of whether informed citizens of the jurisdiction that enacted the statutory offense that the defendant allegedly attempted to commit widely believe or disbelieve that he would have been a threat to interests that the statute seeks to protect - a determination, in turn, that is a function of whether they widely believe or disbelieve that he would have committed the offense under counterfactual circumstances that they fear could have obtained. (shrink)