This paper discusses strategic decision making in firms pursuing biotechnology innovation and the influence of risk regulation on firm strategy. Data from three research projects, involving interviews with over 60 managers from agricultural and food related biotechnology companies and also over 60 key participants in the regulatory process in the UK and EC, shows a diversity of strategy and opinion. While some industry representatives identified new risk regulations governing the release of genetically manipulated organisms (GMOs) as the primary constraint on (...) biotechnology innovation, the findings of the study painted a more complex picture. The controversies surrounding the issue of risk regulation and its impact on innovation are best understood if viewed in the context of other political and economic factors. We conclude that the actual impact of risk regulation on industry strategies is probably less than the rhetoric of industry lobbyists would suggest. At the same time, the very act of lobbying so forcefully could lead to a public backlash against industry that would be much more damaging than the regulation itself. (shrink)

Ulysses is certainly the greatest novel in the English language, and one might argue for its being the greatest single work of art in our tradition. How significant, then, and how teasing, that this masterwork should be a comedy, and that its creator should have explicitly valued the comic "vision" over the tragic—how disturbing to our predilection for order that, with an homage paid to classical antiquity so meticulous that it is surely a burlesque, Joyce's exhibitionististicicity is never so (...) serious as when it is most outrageously comic. Joyce might have been addressing his readers when he wrote to Nora in 1909: "Now . . . I want you to read over and over all I have written to you. Some of it is ugly, obscene, and bestial, some of it is pure and holy and spiritual: all of it is myself." Joyce Carol Oates is the author of, among others, them, Wonderland, and The Assassins. "Jocoserious Joyce" is part of a book on tragedy and comedy. Her contributions to Critical Inquiry, include "Lawrence's Gotterdammerung" and “The Picture of Dorian Gray: Wilde's Parable about the Fall". (shrink)

William Tait is one of the most distinguished philosophers of mathematics of the last fifty years. This volume collects his most important published philosophical papers from the 1980's to the present. The articles cover a wide range of issues in the foundations and philosophy of mathematics, including some on historical figures ranging from Plato to Gdel.

The concept of the Anthropocene draws attention to human activity's impact on the planet at the geological scale. It is tempting to reason that like evolution, a heliocentric solar system or quantum mechanics, climate science compels us to accept as real a radical new ontology, the ‘anthroposphere’, with far-reaching social and political consequences. I wish to argue that this temptation should be resisted. The Anthropocene cannot be understood entirely as a natural scientific phenomenon, although it can be treated as such (...) for certain purposes. It is also an irreducibly social phenomenon. This is not to say that it is a socially constructed concept like nationhood, but that it is constituted by natural causal processes that are irreducibly entangled with social causal processes. Adopting the Anthropocene as a working concept therefore requires that we understand the causal processes involved in bringing it about as social causal processes, while also viewing these processes as objectual, open to public scrutiny and capable of compelling public assent. Social causes are not, however, easily subjected to such a naturalistic treatment. I conclude that the Anthropocene is not currently a suitable candidate for inclusion in a naturalist ontology. (shrink)

Katharine Tait, daughter of Bertrand and Dora Russell, here vividly portrays the extraordinary and stimulating environment she grew up in. In refreshing contrast to the interpretation of Russell as philosopher and public figure, Tait's is a close personal account of her deep love and admiration for her father and its gradual tempering by the imperfections she came to see in him. Touchingly written and beautifully described, the book shows Russell to be a man of great warmth, charm and (...) humour, but is also a testament to the traumas created when he applied his views on marriage and education to his own home. My Father Bertrand Russell is essential reading for those seeking to understand the private background to Russell's ideas, the personal effects of his lifestyle prescriptions, and what it was like to live with a man of such genious. (shrink)

There are some puzzles about G¨ odel’s published and unpublished remarks concerning finitism that have led some commentators to believe that his conception of it was unstable, that he oscillated back and forth between different accounts of it. I want to discuss these puzzles and argue that, on the contrary, G¨ odel’s writings represent a smooth evolution, with just one rather small double-reversal, of his view of finitism. He used the term “finit” (in German) or “finitary” or “finitistic” primarily to (...) refer to Hilbert’s conception of finitary mathematics. On two occasions (only, as far as I know), the lecture notes for his lecture at Zilsel’s [G¨ odel, 1938a] and the lecture notes for a lecture at Yale [G¨ odel, *1941], he used it in a way that he knew—in the second case, explicitly—went beyond what Hilbert meant. Early in his career, he believed that finitism (in Hilbert’s sense) is openended, in the sense that no correct formal system can be known to formalize all finitist proofs and, in particular, all possible finitist proofs of consistency of first-order number theory, P A; but starting in the Dialectica paper.. (shrink)

The pragmatic character of the Dutch book argument makes it unsuitable as an "epistemic" justification for the fundamental probabilist dogma that rational partial beliefs must conform to the axioms of probability. To secure an appropriately epistemic justification for this conclusion, one must explain what it means for a system of partial beliefs to accurately represent the state of the world, and then show that partial beliefs that violate the laws of probability are invariably less accurate than they could be otherwise. (...) The first task can be accomplished once we realize that the accuracy of systems of partial beliefs can be measured on a gradational scale that satisfies a small set of formal constraints, each of which has a sound epistemic motivation. When accuracy is measured in this way it can be shown that any system of degrees of belief that violates the axioms of probability can be replaced by an alternative system that obeys the axioms and yet is more accurate in every possible world. Since epistemically rational agents must strive to hold accurate beliefs, this establishes conformity with the axioms of probability as a norm of epistemic rationality whatever its prudential merits or defects might be. (shrink)

AT PHAEDO 96A-C Plato portrays Socrates as describing his past study of "the kind of wisdom known as περὶ φυσέως ἱστορία." At 96c-97b, Socrates says that this study led him to realize that he had an inadequate understanding of certain basic concepts which it involved. In consequence, he says at 97b, he abandoned this method and turned to a method of his own. But at this point in the dialogue, instead of proceeding immediately to describe his method, Plato has him (...) interjecting a complaint concerning Anaxagoras and his view that everything should be explained in terms of Mind. His complaint is that Mind would order things in the best possible way and that, therefore, an account of things in terms of Mind would amount to showing that they are ordered in the best possible way. But Anaxagoras did not show this and, instead, offered other kinds of explanations of the various phenomena. Socrates is not just criticizing Anaxagoras here for not doing what he set out to do; he makes it clear, for example at 99b-c, that he believes that the best kind of explanation of the phenomena would be to show that they are ordered in the best possible way. But he was unable to discover an explanation of this kind, either for himself or from others, and so turned to a method which he calls "second best". The actual description of this method is contained in two passages, 99e5-100a7 and 101d5-e1. Between these passages, Socrates invokes the doctrine of Forms and, in particular, the formula. (shrink)

This book defends the view that any adequate account of rational decision making must take a decision maker's beliefs about causal relations into account. The early chapters of the book introduce the non-specialist to the rudiments of expected utility theory. The major technical advance offered by the book is a 'representation theorem' that shows that both causal decision theory and its main rival, Richard Jeffrey's logic of decision, are both instances of a more general conditional decision theory. The book solves (...) a long-standing problem for Jeffrey's theory by showing for the first time how to obtain a unique utility and probability representation for preferences and judgements of comparative likelihood. The book also contains a major new discussion of what it means to suppose that some event occurs or that some proposition is true. The most complete and robust defence of causal decision theory available. (shrink)

Colin Radford must weary of defending his thesis that the emotional reactions we have towards fictional characters, events, and states of affairs are irrational.1 Yet, for all the discussion, the issue has not, to my mind, been properly settled—or at least not settled in the manner I should prefer—and so this paper attempts once more to debunk Radford’s defiance of common sense. For some, the question of whether our emotional responses to fiction are rational does not arise, for they are (...) inclined to doubt that we have them at all.2 Emotions, on this view, are fundamentally linked to belief states, as in the following thesis concerning the emotion of fear: 1) We fear for ourselves only if we believe ourselves to be in danger; we fear for others only if we believe they actually exist and are in danger. When we typically engage with fiction we do not ‘suspend our disbelief’, in the sense of coming to believe that the fiction is non-fiction. No matter how engrossed I become in a Dracula movie, I do not begin to believe that I am seeing actual vampires. 2) When we watch a horror movie, we do not believe ourselves, or anyone actual, to be in danger. And so these theorists, endorsing (1) and (2), are obliged to deny the intuitive (3): 3) We are sometimes frightened when watching a horror movie. These three propositions are a version of what is sometimes called ‘The Paradox of Fiction’. For my money, since the denial of (2) is foolish, and the denial of (3) deeply counterintuitive, it is (1)—being a substantive philosophical thesis—that is most likely the culprit. Radford agrees, yet maintains that there is some intimate connection between belief and emotion. For him, the dependence is not the existential one stated in (1), but a normative one: we do not rationally feel fear unless we believe ourselves (or someone actual) to be in danger.3 This revision of the connection allows the construction of a quite different inconsistent triad: 4) We are not rationally frightened unless we believe someone actual to be in danger.. (shrink)

Gödel regarded the Dialectica interpretation as giving constructive content to intuitionism, which otherwise failed to meet reasonable conditions of constructivity. He founded his theory of primitive recursive functions, in which the interpretation is given, on the concept of computable function of finite type. I will (1) criticize this foundation, (2) propose a quite different one, and (3) note that essentially the latter foundation also underlies the Curry-Howard type theory, and hence Heyting's intuitionistic conception of logic. Thus the Dialectica interpretation (in (...) so far as its aim was to give constructive content to intuitionism) is superfluous. (shrink)

Many male traits are well explained by sexual selection theory as adaptations to mating competition and mate choice, whereas no unifying theory explains traits expressed more in females. Anne Campbell's “staying alive” theory proposed that human females produce stronger self-protective reactions than males to aggressive threats because self-protection tends to have higher fitness value for females than males. We examined whether Campbell's theory has more general applicability by considering whether human females respond with greater self-protectiveness than males to other threats (...) beyond aggression. We searched the literature for physiological, behavioral, and emotional responses to major physical and social threats, and found consistent support for females' responding with greater self-protectiveness than males. Females mount stronger immune responses to many pathogens; experience a lower threshold to detect, and lesser tolerance of, pain; awaken more frequently at night; express greater concern about physically dangerous stimuli; exert more effort to avoid social conflicts; exhibit a personality style more focused on life's dangers; react to threats with greater fear, disgust, and sadness; and develop more threat-based clinical conditions than males. Our findings suggest that in relation to threat, human females have relatively heightened protective reactions compared to males. The pervasiveness of this result across multiple domains suggests that general mechanisms might exist underlying females' unique adaptations. An understanding of such processes would enhance knowledge of female health and well-being. (shrink)

More than a decade of exacting scientific research involving paleontological fragments and ancient DNA has lately produced a series of pronouncements about a purportedly novel population of archaic hominins dubbed “the Denisova.” The science involved in these matters is both technically stunning and, socially, at times a bit reckless. Here I discuss the responsibilities which scientists incur when they make inductively risky pronouncements about the different relative contributions by Denisovans to genomes of members of apparent subpopulations of current humans. This (...) science is sensational: it is science which empirically speculates, to the public delight’s and entertainment, about scintillating topics such as when humans evolved, where we came from, and who else we were having sex with during our early hominin history. An initial characterization of sensational science emerges from my discussion of the case, as well as a diagnosis of an interactive phenomenon termed amplified inductive risk. (shrink)

One of the oldest problems in philosophy concerns the relationship between free will and moral responsibility. If we adopt the position that we lack free will, in the absolute sense—as have most philosophers who have addressed this issue—how can we truly be held accountable for what we do? This paper will contend that the most significant and interesting challenge to the long-standing status-quo on the matter comes not from philosophy, jurisprudence, or even physics, but rather from psychology. By examining this (...) debate through the lens of contemporary behaviour disorders, such as ADHD, it will be argued that notions of free will, along with its correlate, moral responsibility, are being eroded through the logic of psychology which is steadily reconfiguring large swathes of familiar human conduct as pathology. The intention of the paper is not only to raise some concerns over the exponential growth of behaviour disorders, but also, and more significantly, to flag the ongoing relevance of philosophy for prying open contemporary educational problems in new and interesting ways. (shrink)

The background of these remarks is that in 1967, in ‘’Constructive reasoning” [27], I sketched an argument that finitist arithmetic coincides with primitive recursive arithmetic, P RA; and in 1981, in “Finitism” [28], I expanded on the argument. But some recent discussions and some of the more recent literature on the subject lead me to think that a few further remarks would be useful.

There are some puzzles about G¨ odel’s published and unpublished remarks concerning finitism that have led some commentators to believe that his conception of it was unstable, that he oscillated back and forth between different accounts of it. I want to discuss these puzzles and argue that, on the contrary, G¨ odel’s writings represent a smooth evolution, with just one rather small double-reversal, of his view of finitism. He used the term “finit” (in German) or “finitary” or “finitistic” primarily to (...) refer to Hilbert’s conception of finitary mathematics. On two occasions (only, as far as I know), the lecture notes for his lecture at Zilsel’s [G¨ odel, 1938a] and the lecture notes for a lecture at Yale [G¨ odel, *1941], he used it in a way that he knew—in the second case, explicitly—went beyond what Hilbert meant. Early in his career, he believed that finitism (in Hilbert’s sense) is openended, in the sense that no correct formal system can be known to formalize all finitist proofs and, in particular, all possible finitist proofs of consistency of first-order number theory, P A; but starting in the Dialectica paper.. (shrink)

In Kingdom and Glory, Agamben analyzed the dual perspective of the void, through the metaphor of the empty throne, in the governmental machine in the West. I engage with the ambiguous question of the void with regard to the concept of sovereignty through my reading of two Chinese intellectuals in the late Qing period, Liang Qichao (1872–1929) and Zhang Taiyan (1869–1936). This paper therefore addresses the question of sovereignty and the void in the discourse of nation in early modern China, (...) an issue that is related to the problem of the political economy or the politics of life. I argue that the rhetorical move in Liang Qichao’s argument for the birth of a new nation and new people was to move from the not-having (無) to the there is (有) in support of the formation of a new nation-state and a restricted logic of sovereignty, while Zhan Taiyan’s position was to affirm the dynamitic re-composition of the void by constantly negating the given fixated state, and thus proposing a different and radical vision of nation and full sovereignty of the lives of each and every one of the people who are co-inhabiting in the polis. (shrink)

In his contribution to this volume, Paul Bloomfield analyzes and attempts to answer the question “Why is it bad to be bad?” I too will use this question as my point of departure; in particular I want to approach the matter from the perspective of a moral error theorist. This discussion will preface one of the principal topics of this paper: the relationship between morality and self-interest. Again, my main goal is to clarify what the moral error theorist might say (...) on this subject. Against this background, the final portion of this paper will be a discussion of moral fictionalism, defending it from some objections. (shrink)

The “self” does not exist within a vacuum. For an entity to be considered to have a sense of self, it requires certain characteristics and attributes. This paper investigates these “structures” of the sense of self in detail, which range from a unified consciousness to self-awareness to personal identity. The paper details how each attribute and characteristic is strictly necessary for an entity to be classified as having a self, and how the five structures detailed within may be used as (...) a guide for categorising and classifying entities as having selfhood or not (or any point along the spectrum between these). The five structures do not represent a theory of selfhood, but rather a meta-theory on the potential emergence and classification of the self. (shrink)

There is a perennial philosophical dream of a certain natural order for the natural kinds. The name of this dream is ‘the hierarchy requirement’. According to this postulate, proper natural kinds form a taxonomy which is both unique and traditional. Here I demonstrate that complex scientific objects exist: objects which generate different systems of scientific classification, produce myriad legitimate alternatives amongst the nonetheless still natural kinds, and make the hierarchical dream impossible to realize, except at absurdly great cost. Philosophical hopes (...) for a certain order in nature cannot be fulfilled. Natural kinds crosscut one another, ubiquitously so, and this crosscutting spells the end of the hierarchical dream. (shrink)

Foundations of a General Theory of Manifolds [Cantor, 1883], which I will refer to as the Grundlagen, is Cantor’s first work on the general theory of sets. It was a separate printing, with a preface and some footnotes added, of the fifth in a series of six papers under the title of “On infinite linear point manifolds”. I want to briefly describe some of the achievements of this great work. But at the same time, I want to discuss its connection (...) with the so-called paradoxes in set theory. There seems to be some agreement now that Cantor’s own understanding of the theory of transfinite numbers in that monograph did not contain an implicit contradiction; but there is less agreement about exactly why this is so and about the content of the theory itself. For various reasons, both historical and internal, the Grundlagen seems not to have been widely read compared to later works of Cantor, and to have been even less well understood. But even some of the more recent discussions of the work, while recognizing to some degree its unique character, misunderstand it on crucial points and fail to convey its true worth. (shrink)

These essays present new analyzes of the central figures of analytic philosophy -- Frege, Russell, Moore, Wittgenstein, and Carnap -- from the beginnings of the analytic movement into the 1930s. The papers do not reflect a single perspective, but rather express divergent interpretations of this controversial intellectual milieu.

This paper has two central purposes: the first is to survey some of the more important examples of fallacious argument, and the second is to examine the frequent use of these fallacies in support of the psychological construct: Attention Deficit Hyperactivity Disorder. The paper divides 12 familiar fallacies into three different categories—material, psychological and logical—and contends that advocates of ADHD often seem to employ these fallacies to support their position. It is suggested that all researchers, whether into ADHD or otherwise, (...) need to pay much closer attention to the construction of their arguments if they are not to make truth claims unsupported by satisfactory evidence, form or logic. (shrink)

The reduction of the lambda calculus to the theory of combinators in [Sch¨ onfinkel, 1924] applies to positive implicational logic, i.e. to the typed lambda calculus, where the types are built up from atomic types by means of the operation A −→ B, to show that the lambda operator can be eliminated in favor of combinators K and S of each type A −→ (B −→ A) and (A −→ (B −→ C)) −→ ((A −→ B) −→ (A −→ C)), (...) respectively.1 I will extend that result to the case in which the types are built up by means of the general function type ∀x : A.B(x) as well as the disjoint union type ∃x : A.B(x)– essentially to the theory of [Howard, 1980]. To extend the treatment of −→ to ∀ we shall need a generalized form of the combinators K and S, and to deal with ∃ we will need to introduce a new form of the combinator S.. (shrink)

Restricted to first-order formulas, the rules of inference in the Curry-Howard type theory are equivalent to those of first-order predicate logic as formalized by Heyting, with one exception: ∃-elimination in the Curry-Howard theory, where ∃x : A.F (x) is understood as disjoint union, are the projections, and these do not preserve firstorderedness. This note shows, however, that the Curry-Howard theory is conservative over Heyting’s system.

Atheism is a familiar kind of skepticism about religion. Moral error theory is an analogous kind of skepticism about morality, though less well known outside academic circles. Both kinds of skeptic face a "what next?" question: If we have decided that the subject matter (religion/morality) is mistaken, then what should we do with this way of talking and thinking? The natural assumption is that we should abolish the mistaken topic, just as we previously eliminated talk of, say, bodily humors and (...) unicorns. The fictionalist, however, offers a less obvious recommendation. According to the fictionalist, engaging in the topic in question provides pragmatic benefits that do not depend on its truth-in a way roughly analogous to engaging with a novel or a movie. The religious fictionalist maintains that even if we were atheists, we should carry on talking, thinking, and acting as if religion were true. The moral fictionalist maintains a similar view regarding moral talk, thought, and action. Both forms of fictionalism face serious challenges. Some challenges can be levelled at either form of fictionalism (or at any form of fictionalism), whereas others are problems unique to moral fictionalism or to religious fictionalism. There are important questions to be asked about the relationship between these two kinds of fictionalism. Could moral fictionalism be plausible even if religious fictionalism is not (or vice versa)? This is a volume of thirteen previously unpublished papers on the topics of religious fictionalism, moral fictionalism, and the relation between these views. (shrink)

Moral thinking pervades our practical lives, but where did this way of thinking come from, and what purpose does it serve? Is it to be explained by environmental pressures on our ancestors a million years ago, or is it a cultural invention of more recent origin? In The Evolution of Morality, Richard Joyce takes up these controversial questions, finding that the evidence supports an innate basis to human morality. As a moral philosopher, Joyce is interested in whether any (...) implications follow from this hypothesis. Might the fact that the human brain has been biologically prepared by natural selection to engage in moral judgment serve in some sense to vindicate this way of thinking--staving off the threat of moral skepticism, or even undergirding some version of moral realism? Or if morality has an adaptive explanation in genetic terms--if it is, as Joyce writes, "just something that helped our ancestors make more babies"--might such an explanation actually undermine morality's central role in our lives? He carefully examines both the evolutionary "vindication of morality" and the evolutionary "debunking of morality," considering the skeptical view more seriously than have others who have treated the subject.Interdisciplinary and combining the latest results from the empirical sciences with philosophical discussion, The Evolution of Morality is one of the few books in this area written from the perspective of moral philosophy. Concise and without technical jargon, the arguments are rigorous but accessible to readers from different academic backgrounds. Joyce discusses complex issues in plain language while advocating subtle and sometimes radical views. The Evolution of Morality lays the philosophical foundations for further research into the biological understanding of human morality. (shrink)

The Evolution of Morality attempts to accomplish two tasks. The first is to clarify and provisionally advocate the thesis that human morality is a distinct adaptation wrought by biological natural selection. The second is to inquire whether this empirical thesis would, if true, have any metaethical implications.

Some Bayesians have suggested that beliefs based on ambiguous or incomplete evidence are best represented by families of probability functions. I spend the first half of this essay outlining one version of this imprecise model of belief, and spend the second half defending the model against recent objections, raised by Roger White and others, which concern the phenomenon of probabilistic dilation. Dilation occurs when learning some definite fact forces a person’s beliefs about an event to shift from a sharp, point-valued (...) subjective probability to an imprecise spread of probabilities. Some commentators find dilation disturbing, both from an epistemic and a decision-theoretic perspective, and place the blame on the use of sets of probabilities to model opinion. These reactions are based on an overly narrow conception of imprecise belief states which assumes that we know everything there is to know about a person’s doxastic attitudes once we have identified the spreads of values for her imprecise credences. Once we recognize that the imprecise model has the resources to characterize a much richer family of doxastic attitudes than this, we will see that White’s charges of epistemological and decision theoretic incoherence are unfounded. (shrink)

This chapter contains sections titled: Descartes' Cogito Augustine's “Si fallor, sum” Argument (If I Am Mistaken, I Exist).

To appear in the Proceedings of Logic Colloquium 2006. (32 pages).

The eminent Veronese physician Gabriele Zerbi held senior positions in three northern Italian cities and was the author of several major books on anatomy, ageing, philosophy and the rol...

In The Myth of Morality, Richard Joyce argues that moral discourse is hopelessly flawed. At the heart of ordinary moral judgements is a notion of moral inescapability, or practical authority, which, upon investigation, cannot be reasonably defended. Joyce argues that natural selection is to blame, in that it has provided us with a tendency to invest the world with values that it does not contain, and demands that it does not make. Should we therefore do away with morality, (...) as we did away with other faulty notions such as witches? Possibly not. We may be able to carry on with morality as a 'useful fiction' - allowing it to have a regulative influence on our lives and decisions, perhaps even playing a central role - while not committing ourselves to believing or asserting falsehoods, and thus not being subject to accusations of 'error'. (shrink)

“Nihilism” (from the Latin “nihil” meaning nothing) is not a well-defined term. One can be a nihilist about just about anything: A philosopher who does not believe in the existence of knowledge, for example, might be called an “epistemological nihilist”; an atheist might be called a “religious nihilist.” In the vicinity of ethics, one should take care to distinguish moral nihilism from political nihilism and from existential nihilism. These last two will be briefly discussed below, only with the aim of (...) clarifying our topic: moral nihilism. Even restricting attention to “moral nihilism,” matters remain indeterminate. Its most prominent usage in the field of metaethics treats it as a synonym for “error theory,” therefore an entry that said only “Nihilism: see ERROR THEORY” would not be badly misleading. This would identify moral nihilism as the metaethical view that moral discourse consists of assertions that systematically fail to secure the truth. (See Mackie 1977; Joyce 2001.) A broader definition of “nihilism” would be “the view that there are no moral facts.” This is broader because it covers not only the error theory but also noncognitivism (see NONCOGNITIVISM). Both these theories deny that there are moral facts—the difference being that the error theorist thinks that in making moral judgments we try to state facts (but fail to do so, because there are no facts of the type in question), whereas the noncognitivist thinks that in making moral judgments we do not even try to state facts (because, for example, these judgments are really veiled commands or expressions of desire). (In characterizing noncognitivism in this way, I am sidelining various linguistic permissions that may be earned via the quasi-realist program (see QUASI-REALISM).) While it is not uncommon to see “nihilism” defined in this broader way, few contemporary noncognitivists think of themselves as “nihilists,” so it is reasonable to suspect that the extra breadth of the definition is often unintentional. Both these characterizations see moral nihilism as a purely metaethical thesis...n. (shrink)