Walter Sinnott-Armstrong

For much of the twentieth century, philosophy and science went their separate ways. In moral philosophy, fear of the so-called naturalistic fallacy kept moral philosophers from incorporating developments in biology and psychology. Since the 1990s, however, many philosophers have drawn on recent advances in cognitive psychology, brain science, and evolutionary psychology to inform their work. This collaborative trend is especially strong in moral philosophy, and these volumes bring together some of the most innovative work by both philosophers and psychologists in this emerging interdisciplinary field. The contributors to volume 1 discuss recent work on the evolution of moral beliefs, attitudes, and emotions. Each chapter includes an essay, comments on the essay by other scholars, and a reply by the author of the original essay. Topics include a version of naturalism that avoids supposed fallacies, distinct neurocomputational systems for deontic reasoning, the evolutionary psychology of moral sentiments regarding incest, the sexual selection of moral virtues, the evolution of symbolic thought, and arguments both for and against innate morality. Taken together, the chapters demonstrate the value for both philosophy and psychology of collaborative efforts to understand the many complex aspects of morality. Contributors: William Casebeer, Leda Cosmides, Oliver Curry, Michael Dietrich, Catherine Driscoll, Susan Dwyer, Owen Flanagan, Jerry Fodor, Gilbert Harman, Richard Joyce, Debra Lieberman, Ron Mallon, John Mikhail, Geoffrey Miller, Jesse Prinz, Peter Railton, Michael Ruse, Hagop Sarkissian, Walter Sinnott-Armstrong, Chandra Sekhar Sripada, Valerie Tiberius, John Tooby, Peter Tse, Kathleen Wallace, Arthur Wolf, David Wong Walter Sinnott-Armstrong is Professor of Philosophy and Hardy Professor of Legal Studies at Dartmouth College

For much of the twentieth century, philosophy and science went their separate ways. In moral philosophy, fear of the so-called naturalistic fallacy kept moral philosophers from incorporating developments in biology and psychology. Since the 1990s, however, many philosophers have drawn on recent advances in cognitive psychology, brain science, and evolutionary psychology to inform their work. This collaborative trend is especially strong in moral philosophy, and these three volumes bring together some of the most innovative work by both philosophers and psychologists in this emerging interdisciplinary field.

Moral intuitions are strong, stable, immediate moral beliefs. Moral philosophers ask when they are justified. This question cannot be answered separately from a psychological question: How do moral intuitions arise? Their reliability depends upon their source. This chapter develops and argues for a new theory of how moral intuitions arise—that they arise through heuristic processes best understood as unconscious attribute substitutions. That is, when asked whether something has the attribute of moral wrongness, people unconsciously substitute a different question about a separate but related heuristic attribute (such as emotional impact). Evidence for this view is drawn from psychology and neuroscience, and competing views of moral heuristics are contrasted. It is argued that moral intuitions are not direct perceptions and, in many cases, are unreliable sources of evidence for moral claims.

We are very grateful to the commentators for taking the time to respond to our little article, ‘What Makes Killing Wrong?’ They raise many points, so we cannot respond to them all, but we do want to head off a few misinterpretations.Our critics in this journal avoid one careless misinterpretation, but less informed readers have pressed this misinterpretation in popular venues, so we need to start by renouncing it. We do not deny that killing humans is morally wrong. To the contrary, we argue that killing humans is almost always morally wrong, because killing humans is almost always disabling, and disabling is morally wrong. Here we do not disagree with common sense. We also do not deny that killing partially or even profoundly disabled humans is morally wrong. People who are disabled in some ways still retain many other valuable abilities. This should be obvious. To kill a person with some disabilities but many other valuable abilities is to disable that person, so that is morally wrong. Here again we do not disagree with common sense. The one and only surprising application of our theory is to humans who are alive but totally disabled. We argue that, apart from special circumstances, it is not morally wrong to kill live humans who are totally disabled, whereas many people think that it would be morally wrong to kill even in these extreme and unusual cases, because they assume that killing is morally wrong for reasons apart from disabling.What could those reasons be? DeGrazia mentions three possibilities. First, ‘the harm of killing —in those ordinary cases in …

Although common sense and literature support the possibility of moral dilemmas, many traditional and contemporary philosophers deny this possibility because of several arguments. Probably the strongest argument against the possibility of moral dilemmas can be called the argument from ought and ought not. Various versions of this argument have been presented by McConnell, Hare, and Conee. Its basic form can be outlined as follows.If any agent is in any moral dilemma, then that agent ought to adopt each of two alternatives but cannot adopt both.If any agent ought to adopt any alternative, but that agent cannot adopt that alternative together with another alternative, then that agent ought not not to adopt that other alternative.Therefore, if any agent is in any moral dilemma, then that agent both ought and ought not to adopt each alternative.It is not possible that any agent both ought and ought not to adopt any alternative.Therefore, it is not possible for any agent to be in any moral dilemma.

A strong tradition in philosophy denies the possibility of moral dilemmas. Recently, several philosophers reversed this tradition. In this dissertation, I clarify some fundamental issues in this debate, argue for the possibility of moral dilemmas, and determine some implications of this possibility. ;In chapter I, I define moral dilemmas roughly as situations where an agent morally ought to adopt each of two alternatives but cannot adopt both. Moral dilemmas are resolvable if and only if one of the moral oughts overrides the other. ;In chapter II, I criticize several opponents of moral dilemmas, including utilitarians, Kant, Aquinas, and Ross. My main criticism is that no opponent of moral dilemmas can adequately justify moral residue . ;Chapters III and IV concern the two main arguments against the possibility of moral dilemmas. First, the argument for 'ought' implies 'can' runs as follows. If the agent cannot adopt both, then it is not the case that the agent ought to adopt both. But the agent ought to adopt both, since the agent ought to adopt each . Thus, the defining judgements of a moral dilemma seem to imply a contradiction. In response, I argue that the relation between 'ought' and 'can' is not a logical implication but a conversational implicature. ;Chapter IV concerns the argument from 'ought' implies 'permitted': If the agent ought to adopt one alternative, then the agent is permitted to adopt that alternative, which means that it is not the case that the agent ought not to adopt that alternative. But the agent ought not to adopt that alternative, since the agent ought to adopt the other alternative and cannot adopt both. I respond that 'ought' does not logically imply but conversationally implicates 'permitted'. ;In chapter V, I argue that, despite recent claims, both moral realism and anti-realism are compatible with the possibility of moral dilemmas. Thus, there are several reasons to accept and no reasons to deny the possibility of moral dilemmas

In this short paper, I argue that the phenomenology of moral judgment is not unified across different areas of morality (involving harm, hierarchy, reciprocity, and impurity) or even across different relations to harm. Common responses, such as that moral obligations are experienced as felt demands based on a sense of what is fitting, are either too narrow to cover all moral obligations or too broad to capture anything important and peculiar to morality. The disunity of moral phenomenology is, nonetheless, compatible with some uses of moral phenomenology for moral epistemology and with the objectivity and justifiability of parts of morality

This chapter criticizes moral intuitionism, which claims that some moral beliefs are justified independently of any ability to infer them from other beliefs. It defines moral intuitionism, and argues that beliefs need confirmation when they are partial, controversial, emotional, or formed in circumstances that are conducive to illusion or unreliability. Empirical research is cited to show that moral beliefs are subject to these problems and, hence, need confirmation by some inference, so moral intuitionism cannot solve the skeptical regress problem.

We show that classical two-valued logic is included in weak extensions of normal three-valued logics and also that normal three-valued logics are best viewed not as deviant logics but instead as strong extensions of classical two-valued logic obtained by adding a modal operator and the right axioms. This article develops a general method for formulating the right axioms to construct a two-valued system with theorems that correspond to all of the logical truths of any normal three-valued logic. The extended classical system can then express anything that can be expressed in the three-valued logic, so there can be no reason to abandon two-valued logic in favor of three-valued logic. Moreover, the two-valued modal system is preferable, because it enables us to study interactions of different operators with different rationales. It also makes it easier to introduce quantifiers and iteration. Nothing is lost and much is gained by choosing the extended two-valued approach over normal three-valued logics

Recent exchanges among Harman, Thomson, and their critics about moral explanations have done much to clarify this two-decades-old debate. I discuss some points in these exchanges along with five different kinds of moral explanations that have been proposed. I conclude that moral explanations cannot provide evidence within an unlimited contrast class that includes moral nihilism, but some moral explanations can still provide evidence within limited contrast classes where all competitors accept the necessary presuppositions. This points towards a limited version of moral skepticism.

The rule ‘Keep your promises’ is often presented as a challenge to consequentialism, because the ground of your moral obligation not to break a promise seems to lie in the past fact that you made the promise, which is not a consequence of the act. A different picture emerges, however, when we move beyond the question of whether you have any moral obligation at all to the related question of how strong that obligation is.If I promise to meet you and some other mutual friends for a casual lunch, then my moral obligation to meet you is not as strong as when I promise to drive you to the airport to catch an important flight. Why not? The natural answer is that, if I break the lunch promise, not much bad will happen. You will still have a pleasant lunch with our other friends, and you and I can still have lunch some other time. I have some moral obligation to meet you, but not a very strong one. In contrast, if I break my driving promise, then my failure will cause much more harm, assuming that you will not find another way to get to the airport in time for your flight. These harmful consequences to you seem to be what give strength to my moral obligation to keep this promise.The relevant kind of strength is measured by how much is needed to override the obligation. I would need much stronger reasons to justify breaking my promise to drive you to the airport than to justify breaking my promise to meet you for lunch. The fact that my teenage child is sick at home might be enough to justify missing the lunch, even if the teenager would be safe at …

In The Architecture of Reason, Robert Audi claims that good reasoning always has some foundation in experience. It is not clear, however, precisely what kind of experience is supposed to ground practical reasoning. It is also not clear whether inference is necessary for a belief to be justified, even when the source of the belief is experience without inference. Finally, it is not clear why beliefs based on some kinds of experience would not need to be justified by inference when beliefs based on other experiential sources (such as extra-sensory perception) do not share this epistemically privileged status