The Is/Ought Gap

This paper considers normative naturalism, understood as the view that (i) normative sentences are descriptive of the way things are, and (ii) their truth/falsity does not require ontology beyond the ontology of the natural world. Assuming (i) for the sake of argument, I here show that (ii) is false not only as applied to ethics, but more generally as applied to practical and epistemic normativity across the board. The argument is a descendant of Moore's Open Question Argument and Hume's Is-Ought (...) Gap. It goes roughly as follows: to ensure that natural ontology suffices for normative truth, there must be semantically grounded entailments from the natural truths to the normative truths. There are none. So natural ontology does not suffice for normative truth. (shrink)

The two dogmas at issue are the Humean dogma that “‘is’ statements do not imply ‘ought’ statements” and the Kantian dogma that “‘ought’ statements imply ‘can’” statements. The extant literature concludes these logically contradict each other. On the contrary, it is argued here that while there is no derivable formal contradiction, the juxtaposition of the dogmas manifests a philosophical disagreement over how to understand the logic of prescriptions. This disagreement bears on how to understand current metaethical debate between realists and (...) non-realists about morality in a way not heretofore investigated. The conclusion is that realists have the resources to account for both dogmas, while non-realists, if they strictly adhere to the “is”/“ought” gap, cannot give an adequate account of why “ought” implies “can”. (shrink)

We raise three issues for Philip Kitcher's "Ethical Project" (2011): First, we argue that the genealogy of morals starts well before the advent of altruism-failures and the need to remedy them, which Kitcher dates at about 50K years ago. Second, we challenge the likelihood of long term moral progress of the sort Kitcher requires to establish objectivity while circumventing Hume's challenge to avoid trying to derive normative conclusions from positive ones--'ought' from 'is'. Third, we sketch ways in which Kitcher's metaethical (...) opponents could respond to his arguments against them. (shrink)

Moral conclusions cannot validly be inferred from nonmoral premises – this principle, commonly called “Hume’s law,” presents a conundrum. On one hand, it seems obviously true, and its truth is often simply taken for granted. On the other hand, an ingenious argument by A. N. Prior seems to refute it. My aim here is a resolution. I shall argue, first, that Hume’s law is ambiguous, admitting both a strong and a weak interpretation; second, that the strong interpretation is false, as (...) shown by Prior’s argument; and, third, that the weak interpretation is true. (shrink)

The ‘No Ought From Is’ principle (or ‘NOFI’) states that a valid argument cannot have both an ethical conclusion and non-ethical premises. Arthur Prior proposed several well-known counterexamples, including the following: Tea-drinking is common in England; therefore, either tea-drinking is common in England or all New Zealanders ought to be shot. My aim in this paper is to defend NOFI against Prior’s counterexamples. I propose two novel interpretations of NOFI and prove that both are true.

Environmental ethics in its modem classical expression by Aldo Leopold appears to fall afoul of Hume’s prohibition against deriving ought-statements from is-statements since it is presented as a logical consequence of the science of ecology. Hume’s is/ought dichotomy is reviewed in its historical theoretical context. A general formulation bridging is and ought, in Hume’s terms, meeting his own criteria for sound practical argument, is found. It is then shown that Aldo Leopold’s land ethic is expressible as a special case of (...) this general formulation. Hence Leopold’s land ethic, despite its direct passage from descriptive scientific premises to prescriptive normative conclusions, is not in violation of any logical strictures which Hume would impose upon axiological reasoning. (shrink)

Fact/value holism has become commonplace in philosophy of science, especially in feminist literature. However, that facts are bearers of empirical content, while values are not, remains a firmly-held distinction. I support a more thorough-going holism: both facts and values can function as empirical claims, related in a seamless, semantic web. I address a counterexample from Kourany where facts and values seem importantly discontinuous, namely, the simultaneous support by the Nazis of scientifically sound cancer research and morally unsound political policies. I (...) conclude that even by the criteria available at the time, Nazi cancer research was empirically weak, and the weaknesses in their research are continuous with their moral failures in just the ways predicted by the holism I support. (shrink)

Jesse Prinz develops a naturalistic metaethical theory with which he purports to sidestep ‘Hume's law’ by demonstrating how, on his theory, in describing what our moral beliefs commit us to we can determine what our moral obligations are. I aim to show that Prinz does not deliver on his prescriptive promise – he does not bridge the is–ought gap in any meaningful way. Given that Prinz goes on to argue that (1) his moral psychology highlights fundamental shortcomings in ‘traditional’ normative (...) ethical theories, (2) that moral progress is possible, despite the relativistic implications of his own position, and (3) that this undermining of the is–ought gap should hold true on any naturalistic metaethical theory, the extent to which his project succeeds becomes significant. (shrink)

The article discusses how and why philosopher Ayn Rand attempted to deduce an ought conclusion from only is premises. It contends that Rand did attempt to deduce what one ought and ought not do from what is or is not the case. It argues that Rand attempted to provide a universally objective unshakable normative moral claim, that people ought to act in accordance with her value and virtue system.

Dans cet article, je présenterai la stratégie adoptée par J. B. Callicott pour ancrer l’écocentrisme dans les sciences biologiques et écologiques tout en restant en accord avec la méta-éthique humienne selon laquelle on ne peut directement inférer un jugement portant sur le devoir-être à partir d'un jugement portant sur l'être. Je le ferai en rappelant d’abord quelques caractéristiques importantes de la méta-éthique humienne quant à la relation entre la raison, les émotions et les jugements de valeur. Je montrerai ensuite comment (...) cette méta-éthique, revisitée en relation avec l’explication évolutionnaire de l’éthique, permet de concevoir l’écocentrisme comme une évolution morale. Finalement, ces caractérisations méta-éthiques me permettront de montrer comment Callicott parvient à justifier la supériorité de l’écocentrisme sur les conceptions rivales en s'appuyant sur des considérations scientifiques, mais sans toutefois commettre le sophisme humien consistant à inférer directement des jugements portant sur le devoir-être à partir de jugements portant sur l'être. (shrink)

Part I of this essay described "Ought" and "Value" as forms of moral requiredness. Now in Part II, a description of the ideal conditions for veridical perceptions of moral requiredness are specified. This is done in the form of an ideal observer type of analysis. This analysis is defended against those who oppose naturalism by assuming a bifurcation between 'ought' and 'is' and those who accuse naturalism of a "naturalistic fallacy." It is argued that theistic versions of the ideal observer (...) form of analysis exist in the Christian tradition in logically acceptable and plausible formulations. Specific illustrations are provided. (shrink)

This is the first of two essays concerned to specify in what sense "ought" and "value" are genuine characteristics of reality serving as data that help us empirically verify the truth and falsity of our moral judgments. This, the first, essay discusses the significance of the ought/is question for moral philosophy and theological ethics, giving reasons for the inadequacy of current views on the relation between "ought" and "is." Building on the perceptual theories of Gestalt psychologists yields a phenomenological description (...) of the nature of "ought" and "value" as unique experiences of gap-induced demands or requiredness. These moral experiences of requiredness are delineated in such a way that they are distinguishable from aesthetic, logical, and causal forms of requiredness. (shrink)

The Evolutionary Manifesto shows that evolution is directional and demonstrates that this has major implications for humanity. The Manifesto shows that humanity must align its social systems and behaviour with the trajectory of evolution if we are to survive and thrive into the future. The Manifesto goes on to demonstrate that humanity has an essential role to play in the future evolution of life on this planet. It demonstrates that life on Earth has reached a critical stage in evolution’s trajectory. (...) Up to now evolution has moved along its trajectory blindly and unconsciously. But if evolution on Earth is to continue to advance successfully in the future, the process will have to be driven intentionally and consciously by humanity. In this way, a proper understanding of evolution shows us how we can live a life that matters in a larger scheme of things. An evolutionary worldview answers the fundamental existential question that faces us all: “What should I do with my life?” The Manifesto outlines in broad terms what humanity must do to advance the evolutionary process—how we will intentionally have to re-make our political, social and economic systems, and how we will need to develop our cognition and consciousness. As such, the Manifesto presents a detailed case for evolutionary activism--coordinated action directed at advancing the evolutionary process intentionally. (shrink)

We propose a critique of normativism, defined as the idea that human thinking reflects a normative system against which it should be measured and judged. We analyze the methodological problems associated with normativism, proposing that it invites the controversial “is-ought” inference, much contested in the philosophical literature. This problem is triggered when there are competing normative accounts (the arbitration problem), as empirical evidence can help arbitrate between descriptive theories, but not between normative systems. Drawing on linguistics as a model, we (...) propose that a clear distinction between normative systems and competence theories is essential, arguing that equating them invites an “is-ought” inference: to wit, supporting normative “ought” theories with empirical “is” evidence. We analyze in detail two research programmes with normativist features – Oaksford and Chater’s rational analysis and Stanovich and West’s individual differences approach – demonstrating how, in each case, equating norm and competence leads to an is-ought inference. Normativism triggers a host of research biases in the psychology of reasoning and decision making: focusing on untrained participants and novel problems, analyzing psychological processes in terms of their normative correlates, and neglecting philosophically significant paradigms when they do not supply clear standards for normative judgement. For example, in a dual-process framework, normativism can lead to a fallacious “ought-is” inference, in which normative responses are taken as diagnostic of analytic reasoning. We propose that little can be gained from normativism that cannot be achieved by descriptivist computational-level analysis, illustrating our position with Hypothetical Thinking Theory and the theory of the suppositional conditional. We conclude that descriptivism is a viable option, and that theories of higher mental processing would be better off freed from normative considerations. (shrink)

Supposedly one cannot infer norms (infer ought from is or is from ought) because of the so-called law of Hume. Hume however never says normative inference be impossible. Rather he says that whoever wishes to infer norms must bear the burden of expliciting their normative steps and their proof. The article explains this misunderstanding hopefully clearing up a field of needless confusion in the law.

Various formally valid counterexamples have been adduced against the Humean dictum that one cannot derive an “ought” from an “is.” There are formal rebuttals—some very sophisticated now (e.g., Charles R. Pigden’s and Gerhard Schurz’s)—to such counterexamples. But what follows is an intuitive and informal argument against them. I maintain that it is better than these sophisticated formal defenses of the Humean dictum and that it also helps us see why it implausible to think that we can be as decisive about (...) the truth or falsity of the dictum as both the formal counterexamples or formal barriers to them purport to be. (shrink)

In this paper, I argue that David Hume's is-ought problem stems from morality as a simplifying framework. Morality is the attempt to describe human behaviour and its relation to nature through a court framework, dating to prehistoric times. Such a court does not really exist, hence we are not referring to anything directly when we make moral statements, and therefore 'is' and 'ought' do not align. The solution is to replace morality with what it's really trying to describe: patterns in (...) individual behaviour. (shrink)

Hume seems to claim that there does not exist a valid argument that has all non-ethical sentences as premises and an ethical sentence as its conclusion. Starting with Prior, a number of counterexamples to this claim have been proposed. Unfortunately, all of these proposals are controversial. Even the most plausible have a premise that seems like it might be an ethical sentence or a conclusion that seems like it might be non-ethical. Since it is difficult to tell whether any of (...) these counterexamples are genuine, we need a taxonomy that sorts out ethical sentences from non-ethical ones. We need to know the difference between an ‘Is’ and an ‘Ought’. In the first part of the paper, I establish the need for a taxonomy. I consider some of the most influential ‘Is’–‘Ought’ derivations. These include proposals by Prior and Searle. I argue that each proposal has a premise whose status as ethical or non-ethical is difficult to determine. In the second part of the paper, I consider taxonomies proposed by Karmo and Maitzen. I argue against both taxonomies. I end with the claim that we need a taxonomy of ethical sentences and that none of the current proposals are adequate. (shrink)

According to John Searle’s well-known Is-Ought Argument, it is possible to derive an ought-statement from is-statements only. This argument concerns obligations involved in institutions such as promising, and it relies on the idea that institutions can be conceptualized in terms of constitutive rules. In this paper, I argue that the structure of this argument has never been fully appreciated. Starting from my status account of constitutive rules, I reconstruct the argument and establish that it is valid. This reconstruction reveals that (...) the soundness of the argument depends on whether collective acceptance as such can generate obligations. Margaret Gilbert has argued that it can, and thus far some of her central arguments have not been addressed. The upshot is that the Is-Ought Argument deserves to be taken seriously once again. (shrink)

The argument that follows has a certain air of prestidigitation about it. I attempt to show that, given a couple of innocent-seeming suppositions, it is possible to derive a positive and complete theory of normative ethics from the Humean maxim "You can't get ought from is." This seems, of course, absurd. If the reasoning isn't completely unhinged, you may be sure, the trick has to lie in those "innocent-seeming" props. And, in fact, you are right. But every argument has to (...) begin somewhere, and, however questionable, those suppositions just don't seem to harbor serious normative import. (shrink)

A Treatise of Human Nature , David Hume's comprehensive attempt to base philosophy on a new, observationally grounded study of human nature, is one of the most important texts in Western philosophy. It is also the focal point of current attempts to understand 18th-century western philosophy. The Treatise addresses many of the most fundamental philosophical issues: causation, existence, freedom and necessity, and morality. The volume also includes Humes own abstract of the Treatise, a substantial introduction, extensive annotations, a glossary, a (...) comprehensive index, and suggestions for further reading. (shrink)

Was Hume here claiming or implying that propositions about what men ought to do are radically different from purely factual propositions, and that they cannot ever be entailed by any purely factual propositions? No, despite Mr Hare, Professor Nowell-Smith, Professor Ayer, Miss Murdoch, Professor Flew, Mr Basson, and The Observer's Brief Guide to philosophy.

Examining the moral sense theories of Francis Hutcheson, David Hume, and Adam Smith from the perspective of the is-ought problem, this essay shows that the moral sense or moral sentiments in those theories alone cannot identify appropriate morals. According to one interpretation, Hume's or Smith's theory is just a description of human nature. In this case, it does not answer the question of how we ought to live. According to another interpretation, it has some normative implications. In this case, it (...) draws normative claims from human nature. Anyway, the sentiments of anger, resentment, vengeance, superiority, sympathy, and benevolence show that drawing norms from human nature is sometimes morally problematic. The changeability of the moral sense and moral sentiments in Hume's and Smith's theories supports this idea. Hutcheson's theory is morally more appropriate because it bases morality on disinterested benevolence. Yet disinterested benevolence is not enough for morality. There are no sentiments the presence of which alone makes any action moral. (shrink)

The debate concerning the proper way of understanding, and hence solving, the “is-ought problem” produced two mutually exclusive positions. One position claims that it is entirely impossible to deduce an imperative statement from a set of factual statements. The other position holds a contrary view to the effect that one can naturally derive an imperative statement from a set of factual statements under certain conditions. Although these two positions have opposing views concerning the problem, it should be evident that they (...) both accept that the “is-ought problem” is concerned with the deducibility of imperative statements from factual statements. Later I will argue that this should not be our concern when we try to make sense of the way we reason about morality. (shrink)

If the logic of belief changes is extended to cover belief states which contain both factual and normative beliefs, it is easily shown that a change of a factual belief (an 'Is') in a mixed belief state can imply a change of a normative belief (an 'Ought') in the same state. With regard to Hume's so-called 'Is-Ought problem', this means that one has to distinguish its statics from its dynamics. When this is done, it becomes clear that changes of factual (...) beliefs can, for rational reasons, have far-reaching normative consequences. Similarly, a change of a factual belief can imply a change of a value belief. (shrink)

For ambitious metaphysical neo-sentimentalists, all normative facts are grounded in fitting attitudes, where fittingness is understood in naturalistic terms. In this paper, I offer a neo-sentimentalist account of blameworthiness in terms of the reactive attitudes of a morally authoritative subject I label a Nagelian Imp. I also argue that moral impermissibility is indirectly linked to blameworthiness: roughly, an act is morally impermissible if and only if and because it is not *possible* in the circumstances to adopt a plan of performing (...) it without meriting blame, assuming the agent is rational, informed, and meets the conditions of accountability. (shrink)

Many naturalistically-minded philosophers want to accomplish a naturalistic reduction of normative (e.g. moral and epistemic) claims. Mindful of avoiding the naturalistic fallacy, such philosophers claim that they are not reducing moral and epistemic concepts or definitions. Rather, they are only reducing the extension of these normative terms, while admitting that the concepts possess a normative content that cannot be naturalistically reduced. But these philosophers run into a serious problem. I will argue that normative claims possess two dimensions of normativity. I (...) will further argue that certain of the reductionist’s commitments require that these two dimensions of normativity be given a naturalistic reduction, while the other of the reductionist’s commitments make such a reduction impossible. Thus, the reductionist’s commitments both require and forbid a reductionist account of morality and epistemology. Thus, as we will see, reductionism is torn between two incompatible requirements, and must fail. (shrink)

Sharon Street (2006) has argued that, given certain plausible evolutionary considerations, normative realism leads to normative skepticism. Street calls this ‘the Darwinian dilemma’. This paper considers the two most popular responses to the Darwinian dilemma and argues that both are problematic. According to the naturalist response, the evolutionary account of our normative dispositions reveals that there was selection for normative dispositions that were reliable with respect to normative truth. According to the minimalist response, the evolutionary account reveals that there was (...) selection of normative dispositions that were reliable with respect to normative truth. This paper argues that the minimalist response is in principle unacceptable, and that the naturalist response faces a very serious difficulty. (shrink)