In this paper we use proof-theoretic methods, specifically sequent calculi, admissibility of cut within them and the resultant subformula property, to examine a range of philosophically-motivated deontic logics. We show that for all of those logics it is a (meta)theorem that the Special Hume Thesis holds, namely that no purely normative conclusion follows non-trivially from purely descriptive premises (nor vice versa). In addition to its interest on its own, this also illustrates one way in which proof theory sheds light on (...) philosophically substantial questions. (shrink)

The autonomy thesis is the claim that one cannot get a normative statement from purely descriptive statements. But despite its intuitive appeal a precise formulation of the thesis has remained elusive. In a recent paper, Maguire makes the promising suggestion that the thesis should be understood in terms of ground. But Maguire’s formulation, I argue, is based on controversial taxonomic assumptions that make the autonomy thesis into a non-substantive claim. I develop an alternative ground-based formulation of the autonomy thesis that (...) appeals to the notion of normative relevance, which is in turn understood using the tools of truthmaker semantics. This formulation of the autonomy thesis avoids well-known counterexamples to other formulations and has significant advantages over Maguire’s formulation. (shrink)

Within the Thomistic moral tradition, the is-ought gap is regularly treated as identical to the fact-value gap, and these two dichotomies are also regularly treated as being identical to Aristotle and Aquinas’s distinction between the practical and speculative intellect. The question whether (and if so, how) practical (‘ought’) knowledge derives from speculative (‘is’) knowledge has driven some of the fiercest disputes among the schools of Thomistic natural lawyers. I intend to show that both of these identifications are wrong and the (...) debate has been misframed. The is-ought gap is not the fact-value gap, nor does the is-ought gap correspond to Aquinas’s distinction between the speculative and practical. This opens the possibility of a resolution--within the Thomistic school--to a debate that has, heretofore, proven particularly resistant of consensus. I close by offering a tentative account of precisely how synderesis gives us our first awareness of moral law from a prior speculative understanding. (shrink)

Hume’s Law that one cannot derive an “ought” from an “is” has often been deemed to bear a significance that extends far beyond logic. Repeatedly, it has been invoked as posing a serious threat to views about normativity: naturalism in metaethics and positivism in jurisprudence. Yet in recent years, a puzzling asymmetry has emerged: while the view that Hume’s Law threatens naturalism has largely been abandoned (due mostly to Pigden’s work, see e.g. Pigden 1989), the thought that Hume’s Law is (...) a serious challenge to positivism has only grown in prominence. Our main aim is to establish that Hume’s Law is not a threat to positivism or naturalism. First, we connect extensive, but unfortunately siloed, discussions of this issue. Second, we show that Hume’s Law is not a serious threat to naturalism or positivism, for the gap between logic and such theses is very hard to bridge in a way that would make Hume’s Law able to bear this significance. Finally, we emphasize an implication of our discussion: it undermines one of the main “dialectical tributaries” in jurisprudence (Toh 2018). (shrink)

It is regrettably common for theorists to attempt to characterize the Humean dictum that one can’t get an ‘ought’ from an ‘is’ just in broadly logical terms. We here address an important new class of such approaches which appeal to model-theoretic machinery. Our complaint about these recent attempts is that they interfere with substantive debates about the nature of the ethical. This problem, developed in detail for Daniel Singer’s and Gillian Russell and Greg Restall’s accounts of Hume’s dictum, is of (...) a general type arising for the use of model-theoretic structures in cashing out substantive philosophical claims: the question of whether an abstract model-theoretic structure successfully interprets something often involves taking a stand on non-trivial issues surrounding the thing. In the particular case of Hume’s dictum, given reasonable conceptual or metaphysical claims about the ethical, Singer’s and Russell and Restall’s accounts treat obviously ethical claims as descriptive and vice versa. Consequently, their model-theoretic characterizations of Hume’s dictum are not metaethically neutral. This encourages skepticism about whether model-theoretic machinery suffices to provide an illuminating distinction between the ethical and the descriptive. (shrink)

Matthew Liao’s edited collection Moral Brains: The Neuroscience of Morality covers a wide range of issues in moral psychology. The collection should be of interest to philosophers, psychologist, and neuroscientists alike, particularly those interested in the relation between these disciplines. I give an overview of the content and major themes of the volume and draw some important lessons about the connection between moral neuroscience and normative ethics. In particular, I argue that moving beyond some of the dichotomies implicit in some (...) of the debates advanced in the book makes the neuroscience of moral judgment much more useful in advancing normative ethics. (shrink)

It was something of a dogma for much of the twentieth century that one cannot validly derive an ought from an is. More generally, it was held that non-normative propositions do not entail normative propositions. Call this thesis about the relation between the natural and the normative Natural-Normative Autonomy. The denial of Autonomy involves the entanglement of the natural with the normative. Naturalism entails entanglement—in fact it entails the most extreme form of entanglement—but entanglement does not entail naturalism. In a (...) ground-breaking paper “The autonomy of ethics” Arthur Prior constructed some intriguing counterexamples to Autonomy. While his counterexamples have convinced few, there is little agreement on what is wrong with them. I present a new analysis of Autonomy, one which is grounded in a general and independently plausible account of subject matters. While Prior’s arguments do establish shallow natural-normative entanglement, this is a consequence of simple logical relationships that hold between just about any two subject matters. It has nothing special to do with the logical structure of normativity or its relation to the natural. Prior’s arguments leave the fundamental idea behind natural-normative Autonomy intact. I offer a new argument for deep entanglement. I show that in any framework adequate for dealing with the natural and the normative spheres, a purely natural proposition entails a purely normative proposition, and vice-versa. But this is no threat to non-naturalist moral realism. In fact it helps ameliorate the excesses of an extreme non-naturalism, delivering a more palatable and plausible position. (shrink)

This addendum presents results that confound some commonly made claims about the sorts of environments in which the performance of TTB exceeds that of Franklin's rule, and vice versa.

The paper develops a Kantian view of the highest good and the relation between virtue and happiness. Several Kantian theses are defended, among them the thesis that the highest good is realized only if every virtuous individual is happy, the view that virtue is neither necessary nor sufficient for happiness, and the proposition that virtue is both necessary and sufficient for the worthiness of being happy. The author argues that the highest good ought to be realized and that it ought (...) to be that everyone who is virtuous is happy. To prove these claims, the author will use techniques developed by modern deontic logicians. According to Kant, we do not have an immediate duty to promote our own happiness, the aim of morality being not personal satisfaction but rather virtue and the good will. The important question is not “How do I become happy?” but “How do I become good?”. The arguments in this paper support this view. (shrink)

The construct “remembering” is equivocal between an epistemic sense, denoting a distinctive ground for knowledge, and empirical sense, denoting the typical behavior of a neurocognitive mechanism. Because the same kind of equivocation arises for other psychologistic terms (such as believe, decide, know, judge, decide, infer and reason), the effort to spot and remedy the confusion in the case of remembering might prove generally instructive. The failure to allow these two senses of remembering equal play in their respective domains leads, I (...) argue, to unnecessary confusion about memory externalism, the possibility of episodic memory in non-human species, and the thesis of memory continuism. By distinguishing these equivocal senses of remembering, we thus gain leverage on understanding how the distinctive epistemic norms that define many of our psychologic terms are more plausibly related to the capacities studied by empirical science, given that neither identity nor elimination are possible. (shrink)

In this essay, I examine those versions of hylomorphism that attribute to form a very strong explicative role. According to them, form is both the source of new emergent powers and expression of the finalist structure of organisms. The main aim of this essay is to show that these two aspects do not holdup because the form only exercises a structural function, but does not exert an autonomous explanatory function. The form only allows the material components to develop those powers (...) that are not manifest in themselves, outside the configuration that forms as structure gives them. If the higher faculties of the human mind are really emergent over the neurophysiological ones, hylomorphism cannot explain it. As a consequence, hylomorphism does not have the resources to oppose materialism, on the one hand, and dualism, on the other. (shrink)

An increasing number of moral realists and anti-realists have recently attempted to support their views by appeal to science. Arguments of this kind are typically criticized on the object-level. In addition, however, one occasionally also comes across a more sweeping metatheoretical skepticism. Scientific contributions to the question of the existence of objective moral truths, it is claimed, are impossible in principle; most prominently, because such arguments impermissibly derive normative from descriptive propositions, such arguments beg the question against non-naturalist moral realism, (...) science cannot inform conceptual accounts of moral judgements, and the conceptual is logically prior to the empirical. My main aim in this paper is to clarify and critically assess these four objections. Moreover, based on this assessment, I will formulate four general requirements that science-based arguments in favor of moral realism and anti-realism should meet. It will turn out that these arguments are limited in several ways, and that some existing arguments have been unsound. Yet it is still possible in principle for the empirical sciences to contribute to the moral realism/anti-realism debate. (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)

This paper is divided into two parts. In the first one I distinguish between weak and strong Anti-Archimedeanisms, the latter being the view that metaethics, just as any other discipline attempting to work out a second-order conceptual, metaphysical non-committed discourse about the first-order discourse composing normative practices, is conceptually impossible or otherwise incoherent. I deal in particular with Ronald Dworkin’s famous exposition of the view. I argue that strong Anti-Archimedeanism constitutes an untenable philosophical stance, therefore making logical space for the (...) practice of a discipline such as metaethics—conceived as ethically neutral. This makes space, concurrently, for neutral conceptual jurisprudence. In the second part of the article, I attempt to show two things. On the one hand, that Dworkin’s widely discussed ‘challenge of disagreements’ to legal positivism is founded upon strong Anti-Archimedeanism. On the other hand, that having rejected strong Anti-Archimedeanism we should consequently reject the challenge as a serious challenge to positivism. This move, of course, does not thereby imply that accounting for legal disagreements is not an important jurisprudential task. But it marks—contra Dworkin—that there is no principled or a priori impossibility of doing so within a positivist framework. (shrink)

Normativism, the approach that judges human rationality by comparison against normative standards, has recently come under intensive criticism as unsuitable for psychological enquiry, and it has been suggested that it should be replaced with a descriptivist paradigm. My goal in this paper is to outline and defend a meta-theoretical framework of such a paradigm, grounded rationality, based on the related principles of descriptivism and (moderate) epistemic relativism. Bounded rationality takes into account universal biological and cognitive limitations on human rationality. Grounded (...) rationality accepts universal constraints but adds cognitive variability: Within-individual variability (dual processing), and individual as well as cultural differences. I discuss the implications of grounded rationality to dual processing, proposing that investing limited cognitive resources in analytic processing might be less instrumentally rational for individuals with low cognitive ability. (shrink)

There is a substantial disagreement in the literature over whether ‘remembering’ is a normative concept. Some philosophers have attempted to defend the normativity of ‘remembering’ by highlighting its normative importance or its conceptual affinities with ‘knowing’ or ‘duties’. This paper will first reveal defects of these existing normativist arguments. After that, I will propose and defend a new normativist argument, according to which the concept ‘remembering’ is partly constituted by a paradigmatically normative concept, namely ‘rational’. To be more specific, I (...) argue that full possession of the concept of ‘remembering’ requires having an inclination to believe that ‘if S remembers that p, then S would be (at least defeasibly) rational in holding a memory-based belief that p’. This, according to a persuasive constitutive account of normative concepts, suffices to demonstrate the normative nature of remembering. (shrink)

This edited volume provides a biosemiotic analysis of the ecological relationship between food and medicine. Drawing on the origins of semiotics in medicine, this collection proposes innovative ways of considering aliments and treatments. Considering the ever-evolving character of our understanding of meaning-making in biology, and considering the keen popular interest in issues relating to food and medicines - fueled by an increasing body of interdisciplinary knowledge - the contributions here provide diverse insights and arguments into the larger ecology of organisms’ (...) engagement with and transformation through taking in matter. Bodies interpret molecules, enzymes, and alkaloids they intentionally and unintentionally come in contact with according to their pre-existing receptors. But their receptors are also changed by the experience. Once the body has identified a particular substance, it responds by initiating semiotic sequences and negotiations that fulfill vital functions for the organism at macro-, meso-, and micro-scales. -/- Human abilities to distill and extract the living world into highly refined foods and medicines, however, have created substances far more potent than their counterparts in our historical evolution. Many of these substances also lack certain accompanying proteins, enzymes, and alkaloids that otherwise aid digestion or protect against side-effects in active extracted chemicals. Human biology has yet to catch up with human inventions such as supernormal foods and medicines that may flood receptors, overwhelming the body’s normal satiation mechanisms. This volume discusses how biosemioticians can come to terms with these networks of meaning, providing a valuable and provocative compendium for semioticians, medical researchers and practitioners, sociologists, cultural theorists, bioethicists and scholars investigating the interdisciplinary questions stemming from food and medicine. (shrink)