Schurz draws on modern alethic- deontic predicate logic to address the venerable yet enduring problem of whether what ought to be can be derived from what is. After two extensive introductory chapters supplying the background in philosophy and logic to readers unfamiliar with it, he examines such dimensions as the logical explication of Hume's thesis, the special Hume thesis, weakened versions of it, generalizations, some applications to ethical arguments, problems of identity and existence, whether there are analytic bridge (...) principles, and whether they are scientifically justifiable. The inquiry is expanded from Part II of his 1989 Relevant Deduction in Science and Ethics with a Case Study of the Is-Ought Problem. No index. Annotation copyrighted by Book News, Inc., Portland, OR. (shrink)

Book Information The Is-Ought Problem: An Investigation in Philosophical Logic. By Gerhard Schurz. Kluwer. Dordrecht. 1997. Pp. x + 332. £92.25.

The article deals with a recent attack by Sam Harris on two famous arguments that purport to establish a gap between factual and evaluative statements—Hume’s Is-Ought Problem and Moore’s Open Question Argument. I present the arguments, analyze the relationship between them and critically assess Harris’ attempt to refute them. I conclude that Harris’ attempt fails.

This article is concerned with the role empirical research can play in normative practical ethics. There is no doubt that ethical research requires some kind of collaboration between normative disciplines and empirical sciences. But many researchers hold that empirical science is only assigned a subordinate role, due to the doctrine that normative conclusions cannot be justified by descriptive premises. Scientists working in the field of ethics commonly hold, however, that the empirical sciences should play a much bigger role in ethical (...) research. The aim of this paper is to show that empirical sciences can play a substantive role in normative ethics, with no illicit inferences from is to ought. To achieve this aim, I explain Hume’s thesis. In the following sections, I am concerned with different uses of empirical data that do not imply an illicit inference from descriptive premises to a normative conclusion. The article demonstrates that there are many modes of ethical reasoning that allow for a substantive use of empirical data, and it also shows the importance of Hume’s thesis for clarifying ethical reasoning. (shrink)

This paper further cashes out the notion that particular types of intelligent systems are susceptible to the is-ought problem, which espouses the thesis that no evaluative conclusions may be inferred from factual premises alone. Specifically, it focuses on top-down artificial moral agents, providing ancillary support to the view that these kinds of artifacts are not capable of producing genuine moral judgements. Such is the case given that machines built via the classical programming approach are always composed of two (...) parts, namely: a world model and utility function. In principle, any attempt to bridge the gap between these two would fail, since their reconciliation necessitates for the derivation of evaluative claims from factual premises. (shrink)

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)

There have been books written since 1997 both on Hume’s ethics and on metaethics generally which make no mention of Gerhard Schurz’s The Is-Ought Problem. I don’t say that they are ipso facto bad books since they may have merits which make up for this glaring defect. But Schurz’s magnificent The Is-Ought Problem is a major contribution to both logic and metaethics and ethicists who disregard it do so at their intellectual peril.

This chapter focuses on one of the common fallacies in Western philosophy called the 'is/ought fallacy (IOF)'. Some philosophers conclude that the IOF is not a logical problem but an epistemological one, meaning that even if inferences like this one are logically valid, they cannot be used epistemologically to warrant anyone's real‐life moral beliefs. Arguments do not warrant their conclusions unless the premises of those arguments are themselves warranted, and in the real world, they say, no one would (...) ever be warranted in believing premise. Charles Pigden argues for the illegitimacy of the move from is to ought, saying that we should understand David Hume as pointing to the conservativeness of logic. According to Pigden, logic is conservative in that “the conclusions of a valid inference are contained within the premises. You do not get out what you have not put in”. (shrink)

Focusing mainly on Meinong’s "Über emotionale Präsentation" and Veber’s "Die Natur des Sollens", I examine their respective conceptions of ought. Meinong has not written a specific work on the ought, he deals with it as a part of his value theory. In "Über emotionale Präsentation" the ought is a property of being, which cannot be viewed as separated from a desiring subject. The ought is an ideal object of higher order; it concerns neither factuality nor non-factuality, (...) but subfactuality, that is the realm of possibility. In "Die Natur des Sollens", Veber proposes a structured theory of ought, which is grounded on Meinongian concepts. The ought is the object of a volition, it is a genuine object, even though ideal. I conclude by portraying the differences between Veber's and Meinong's conceptions of the ought. (shrink)

This paper is an attempt to apply the truthmaker approach, recently developed by a number of authors, to the problem of providing an adequate formulation of the is–ought gap. I begin by setting up the problem and criticizing some other accounts of how the problem should be stated; I then introduce the basic apparatus of truth-making and show how it may be extended to include both descriptive and normative truth-makers; I next consider how the gap principle (...) should be formulated, attempting to deal as systematically as possible with the ‘harmless’ counter-examples; I also consider the relationship between the gap principle and various other doctrines concerning the separation between the normative and descriptive realms; and I conclude this part of the paper with some general remarks in favor of adopting the truth-maker approach over some of the alternative approaches. The paper concludes with a formal appendix, which gives precise expression to some of claims made in the previous informal part of the paper. (shrink)

We propose a critique ofnormativism, 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)

We argue that once a normative claim is developed, there is an imperative to effect changes based on this norm. As such, ethicists should adopt an “implementation mindset” when formulating...

"THE central problem in moral philosophy is commonly known as the is-ought problem." So runs the opening sentence of the introduction to a recent volume of readings on this issue. [1] Taken as a statement about the preoccupations of moral philosophers of the present century, we can accept this assertion. The problem of how statements of fact are related to moral judgments has dominated recent moral philosophy. Associated with this problem is another, which has also (...) been given considerable attention - the question of how morality is to be defined. The two issues are linked, since some definitions of morality allow us to move from statements of fact to moral judgments, while others do not. In this article I shall take the two issues together, and try to show that they do not merit the amount of attention they have been given. I shall argue that the differences between the contending parties are terminological, and that there are various possible terminologies, none of which has, on balance, any great advantage over any other terminology. So instead of continuing to regard these issues as central, moral philosophers could, I believe, "agree to disagree" about the "is-ought" problem, and about the definition of morality, provided only that everyone was careful to stipulate how he was using the term "moral" and was aware of the implications and limitations of the definition he was using. Moral philosophers could then move on to consider more important issues. (shrink)

Kant's attack on metaphysics consists in large part in his attack on a principle that he names the Supreme Principle of Pure Reason. This principle, it is not often noticed, is the Principle of Sufficient Reason [PSR]. In interpreting this principle as such, I argue that Kant's attack on the PSR depends on Kant's claim that existence is not a first-order predicate. If existence isn't what Kant calls a real predicate, the PSR is false. While this constitutes a powerful Kantian (...) argument against dogmatic rationalism, it also poses a problem for Kant. For, as I argue, if the PSR is true, Kant's argument that existence isn't a first-order predicate is false. In this sense, Kant's attack on the PSR is begging the question vis-á-vis radical metaphysicians. Concluding the paper I suggest relying on Kant's 'is'/'ought' distinction in avoiding this circularity, thereby reinforcing the Kantian critique. (shrink)

Huw Price argues that there are two conceptions of the puzzle of the time‐asymmetry of thermodynamics. He thinks this puzzle has remained unsolved for so long partly due to a misunderstanding about which of these conceptions is the right one and what form a solution ought to take. I argue that it is Price's understanding of the problem which is mistaken. Further, it is on the basis of this and other misunderstandings that he disparages a type of account (...) which does, in fact, hold promise of a solution. (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)

The chapter has two parts. In the first part, I introduce a more fine-grained analysis of evaluative sentences. I distinguish between evaluations proper and directions for action with several degrees of constraint: commands, pieces of advice, suggestions, and so on. I call the latter “ductive-statements.” Thus, I affirm that the realm of morals has two branches: one relative to evaluations, which are is-sentences ranging from the several degrees between good and bad to the indifferent ; the other relative to sentences (...) having a “ductive” force that impose, with different degrees of coercion, a course of action. In the second part of the chapter, I address Searle’s famous argument concerning the derivation of ought-sentences from is-sentences. Relying on my previous distinctions, I argue that Searle’s derivation is flawed in two main points, which I present and discuss at length. (shrink)

Neuroscience and education is a developing area which has come in for some serious philosophical scrutiny. One of the biggest and most intractable problems concerns the bridging of the ‘is-ought’ gap between the descriptive claims of neuroscience and the prescriptive aims of education. A distinction needs to be drawn between learning and education. Advances in neuroscience might tell us more about learning as a neural process such as where in the brain particular learnings might take place and how such (...) learnings take place. But from this nothing follows about what we ought to do to improve learning until such time as judgements are made about what is to be learned. Education, as a normative activity about what is worthwhile and what it is to be an educated person, cannot be reduced to learning even though learning is required in order to become educated. Neuroscience has a very limited role in education which amounts to no more than providing some empirical evidence which can be drawn upon to inform normative decisions about the educational worth of learning. (shrink)

Biocentrism, a prominent view in environmental ethics, is the notion that all and only individual biological organisms have moral status, which is to say that their good ought to be considered for its own sake by moral agents. I argue that biocentrism suffers two serious problems: the Origin Problem and the Normativity Problem. Biocentrism seeks to avoid the absurdity that artifacts have moral status on the basis that organisms have naturalistic origins whereas artifacts do not. The Origin (...) Problem contends that, contra biocentrism, an entity’s origin is not relevant to whether that entity has moral status. The Normativity Problem is that biocentrists are preoccupied with accounting for the goods or interests of nonsentient organisms yet fail to establish why interests so construed confer moral status; biocentrism fails to bridge the good-ought gap. It is shown how these problems emerge in three prominent book-length works representative of the biocentrists’ positions over three decades: Paul Taylor’s Respect for Nature, Gary Varner’s In Nature’s Interests?, and Nicholas Agar’s Life’s Intrinsic Value. At minimum, these criticisms suggest that biocentrism is crucially incomplete as a moral framework at present and, optimistically, where more work remains to be done. If biocentrism really is dead, then moral status should be restricted to a more plausible locus such as sentience or rationality, the value of organisms needs a different expression, and environmental ethics needs an axiological foundation different than bare life. (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.

In “The Ethics of Advertising for Health Care Services” (2014), Schenker, Arnold, and London argue that advertisements for physicians, hospitals, and other health care services are morally problematic and ought to be regulated by the Food and Drug Administration (FDA) as it regulates prescription drug ads. I argue that the regulation of prescription drug ads has been so ineffective that, if the harms of health care service ads are similar to the harms of drug ads, such regulation is bound (...) to fail. This is a major public health concern, because any good produced by these ads does not necessarily morally compensate for the harm caused. If the ads cannot be banned entirely, I propose a regulatory strategy that involves redesigning them from the ground up. (shrink)

There is probably no student of modern philosophy, and certainly no listener to the Third Programme, who has never received the warning that he must on no account deduce an “ought” from an “is.” This prohibition, it is claimed, is securely based in established and unchallengeable principles of logic. Professor Flew was speaking for many others when he said, in the course of a broadcast entitled “Problems of Perspectives”, “I think it is very important indeed to make as clear (...) as we can and to underline with all possible emphasis that this is a point of inexorable logic”. And Professor Popper, to take but one other example, has expressed himself no less trenchantly: “Perhaps the simplest and most important point about ethics is purely logical, I mean the impossibility to derive nontautological ethical rules—imperatives, principles of policy, aims or however we may describe them—from statements of fact”—a view that is fully endorsed by Mr. Hare in his Language of Morals. (shrink)

My paper has two aims: to underscore the importance of differently time-indexed ‘ought implies can’ principles; and to apply this to the culpable inability problem. Sometimes we make ourselves unable to do what we ought, but in those cases, we may still fail to do what we ought. This is taken to be a serious problem for synchronic ‘ought implies can’ principles, with a simultaneous ‘ought’ and ‘can’. Some take it to support diachronic (...) ‘ought implies can’, with a potentially temporally distinct ‘ought’ and ‘can’. I will argue that this problem is not avoided by diachronic ‘ought implies can’. (shrink)

Kratzer semantics for modals and conditionals generates the prediction that sentences of the form if p, ought p are trivially true. As Frank and Zvolenszky show, for certain flavors of modality, like deontic modality, this prediction is false. I explain some conservative solutions to the problem, and then argue that they are inadequate to account for puzzle cases involving self-frustrating oughts. These cases illustrate a general problem: there are two forms of information-sensitivity in deontic modals. Even generalizations (...) of Kratzer semantics that predict these two roles for information, e.g. Kolodny and MacFarlane, predict that they vary together. I propose a generalization of Kratzer semantics that allows the two roles for information to vary independently of each other. (shrink)

What follows is a taxonomy of arguments that regresses of inferential justification are vicious. They fall out into four general classes: conceptual arguments from incompleteness, conceptual arguments from arbitrariness, ought-implies-can arguments from human quantitative incapacities, and ought-implies can arguments from human qualitative incapacities. They fail with a developed theory of "infinitism" consistent with valuational pluralism and modest epistemic foundationalism.

To argue that “ought” implies “can,” one can appeal to general principles or to intuitions about specific cases. One general truism that seems to show that “ought” implies “can” is that obligations must be able to guide action, and putative obligations that are unfulfillable are unable to do so. This paper argues that obligations that are unfulfillable can still guide action, and that moral theories which reject the principle that “ought” implies “can” are actually better able to (...) account for how obligations guide than theories which endorse “ought” implies “can.” The paper also argues that any intuitions about specific cases that seem to provide evidence that “ought” implies “can” do not actually give us this evidence. Rather, these intuitions pose similar problems for theories which accept “ought” implies “can” as they pose for theories which reject the principle. Some theories which reject “ought” implies “can” will fit our intuitions at least as well, if not better, than theories which accept it. So, intuitions do not favor accepting that “ought” implies “can,” and appeal to general principles favors its denial. (shrink)

Within a single paragraph in his Treatise of Human Nature, David Hume prompted what has become one of the most central orthodoxies in ethical theory: the thesis that one cannot derive what ought to be from what there is. In the aftermath of Hume’s seminal discussion, the No-Ought-From-Is-thesis has obtained approval among moral theorists to the point that it has been assigned the status of an undisputed ‘law’. As common with commonplaces in philosophy, alas, both the exact content (...) and argument of ‘Hume’s Law’ have proven to be quite elusive. The present anthology aims to clarify and discuss several controversies surrounding the No-Ought-From-Is-thesis. (shrink)

The incomparability of alternatives is thought to pose a problem for justified choice, particularly for proponents ofcomparativism– the view that comparative facts about alternatives determine what one rationally ought to choose. As a solution, it has been argued that alternatives judged incomparable by one of the three standard comparative relations, “better than,” “worse than,” and “equally good,” are comparable by some fourth relation, such as “roughly equal” or “on a par.” This solution, however, comes at what many would (...) regard as too high a cost – namely, rejection of the transitivity of the relation “at least as good as.” In this paper, I argue that proponents of comparativism need not incur this cost. I defend the possibility of justified choice between incomparable alternatives on grounds that comparativists can accept. The possibility of incomparability has been met with resistance, in part because of the intuitive appeal of comparativism. By defending the possibility of justified choice between incomparable alternatives on grounds that comparativists can accept, this paper supports further inquiry into the subject of incomparability. (shrink)

In a recent article, J. Angelo Corlett criticises what he takes to be the ‘offensiphobic’ practices characteristic of many universities. The ‘offensiphobe’, according to Corlett, believes that offensive speech ought to be censured precisely because it offends. We argue that there are three serious problems with Corlett’s discussion. First, his criticism of ‘offensiphobia’ misrepresents the kinds of censorship practiced by universities; many universities may in some way censure speech which they regard as offensive, but this is seldom if ever (...) a manifestation of ‘offensiphobia’. Second, we attempt to reconstruct Corlett’s criticism of ‘offensiphobia’ as a criticism of the practice of censuring hate speech, and show that this argument is unsuccessful. Third, we offer some brief reflections on how labelling universities as ‘offensiphobic’ is especially problematic in light of the current climate of political interference in university research and teaching. (shrink)

Probably most of us have suffered at the hands of a friend who continually turned to us for help, as well having been grieved by a friend who failed to do so on a given occasion. And we have probably been chagrinned by friends who divulge to us only the most limited knowledge about their past problems, as well as by friends who provide unnecessary information about their woeful past. The purpose of this paper is to set out Aquinas’s recommendations (...) for the moral guidelines to be followed in deciding which problems we disclose to our friends; these guidelines include: (1) not placing burdens on friends unnecessarily; (2) affording one’s friends the opportunity to do one good; (3) living in accord with one’s social nature; (4) being genuine; (5) encouraging friends struggling with moral problems; (6) bearing faith witness on occasion; (7) avoiding scandal; and (8) avoiding vices involving speech. (shrink)

Probably most of us have suffered at the hands of a friend who continually turned to us for help, as well having been grieved by a friend who failed to do so on a given occasion. And we have probably been chagrinned by friends who divulge to us only the most limited knowledge about their past problems, as well as by friends who provide unnecessary information about their woeful past. The purpose of this paper is to set out Aquinas’s recommendations (...) for the moral guidelines to be followed in deciding which problems we disclose to our friends; these guidelines include: (1) not placing burdens on friends unnecessarily; (2) affording one’s friends the opportunity to do one good; (3) living in accord with one’s social nature; (4) being genuine; (5) encouraging friends struggling with moral problems; (6) bearing faith witness on occasion; (7) avoiding scandal; and (8) avoiding vices involving speech. (shrink)