Wood and Spekkens argue that any causal model explaining the EPRB correlations and satisfying the no-signalling constraint must also violate the assumption that the model faithfully reproduces the statistical dependences and independences—a so-called ‘fine-tuning’ of the causal parameters. This includes, in particular, retrocausal explanations of the EPRB correlations. I consider this analysis with a view to enumerating the possible responses an advocate of retrocausal explanations might propose. I focus on the response of Näger, who argues that the central ideas (...) of causal explanations can be saved if one accepts the possibility of a stable fine-tuning of the causal parameters. I argue that in light of this view, a violation of faithfulness does not necessarily rule out retrocausal explanations of the EPRB correlations. However, when we consider a plausible retrocausal picture in some detail, it becomes clear that the causal modelling framework is not a natural arena for representing such an account of retrocausality. _1_ Causal Models, Quantum Mechanics, and Faithfulness _2_ Fine-Tuning _2.1_ Fine-tuning in a retrocausal model _3_ Possible Responses _4_ Quantum Causal Models and Retrocausality _4.1_ A more detailed retrocausal account _4.2_ A model of the EPRB probabilities _4.3_ Mapping to a causal model _5_ Conclusion. (shrink)

Despite attempts to apply causal modeling techniques to quantum systems, Wood and Spekkens argue that any causal model purporting to explain quantum correlations must be fine tuned; it must violate the assumption of faithfulness. This paper is an attempt to undermine the reasonableness of the assumption of faithfulness in the quantum context. Employing a symmetry relation between an entangled quantum system and a “sideways” quantum system consisting of a single photon passing sequentially through two polarizers, I argue that (...) class='Hi'>Wood and Spekkens’s analysis applies equally to this sideways system also. As a result, we must either reject a causal explanation in this single photon system, or the sideways system must be fine tuned. If the latter, a violation of faithfulness in the ordinary entangled system may be more tolerable than first thought. Thus, extending the classical “no fine-tuning” principle of parsimony to the quantum realm may be too hasty. (shrink)

This book's importance is derived from three sources: careful conceptualization of teacher induction from historical, methodological, and international perspectives; systematic reviews of research literature relevant to various aspects of teacher induction including its social, cultural, and political contexts, program components and forms, and the range of its effects; substantial empirical studies on the important issues of teacher induction with different kinds of methodologies that exemplify future directions and approaches to the research in teacher induction.

It is the prevailing paradigm in contemporary physics to model the dynamical evolution of physical systems in terms of a real parameter conventionally denoted as 't' ('little tee'). We typically call such dynamical models laws of nature' and t we call 'physical time'. It is common in the philosophy of time to regard t as time itself, and to take the global structure of general relativity as the ultimate guide to physical time, and so consequently the true nature of time. (...) In this paper we defend the idea that physical time, t, is rather better defined as an operational modelling parameter: we measure relations between changing physical quantities using bespoke physical systems---i.e. clocks---that coordinate local coincidences. We argue that the sorts of physical systems that make good clocks---what we call precision clocks---are those that exhibit self-sustained oscillations known as limit cycles, which are ubiquitous in open, driven, stable, dissipative systems. We develop the physical and philosophical ramifications of this conception of physical time, particularly the notion that physical time does not track something 'out there' in the world. As a result, we speculate that physical time is perhaps not as different from manifest time as many philosophers of time (and apparently general relativity) seem to suggest. (shrink)

In this paper I defend an account of the nature of propositional content according to which the proposition expressed by a declarative sentence is a certain type of action a speaker performs in uttering that sentence. On this view, the semantic contents of proper names turn out to be types of reference acts. By carefully individuating these types, it is possible to provide new solutions to Frege’s puzzles about names in identity- and belief-sentences.

In 1736, an 80-year-old Edmond Halley, dignified by the academic robes of his alma mater, Queens College Oxford, sat down at the brush of transplanted Swedish artist Michael Dahl for his final official portrait.1 By the time he posed for Dahl, Halley occupied a rank of distinction among practical philosophers of the early Enlightenment. His manifold achievements included authorship of the first catalogue of stars in the Michael Dahl, “Dr E Halley, Aged 80.” © The Royal Society. southern hemisphere, the (...) laying of actuarial foundations for life insurance and annuities, his correct prediction of the return in 1758, 1835, and 1910 of a bright periodic comet that today bears .. (shrink)

Martine Nida-Rümelin (1996) argues that color science indicates behaviorally undetectable spectrum inversion is possible and raises this possibility as an objection to functionalist accounts of visual states of color. I show that her argument does not rest solely on color science, but also on a philosophically controversial assumption, namely, that visual states of color supervene on physiological states. However, this assumption, on the part of philosophers or vision scientists, has the effect of simply ruling out certain versions of functionalism. While (...) Nida-Rümelin is quite right to search for empirical tests for claims about the nature of visual states, philosophical issues remain pivotal in determining the correctness of these claims. (shrink)

All nursing courses in the UK include ethics in the curriculum, although there is considerable variation in the content of ethics courses and the teaching methods used to assist the acquisition of ethical reasoning. The effectiveness of ethics courses continues to be disputed, even when the perceptions and needs of students are taken into account in their design. This longitudinal study, carried out in the UK, but with implications for nurse education in other developed countries, explored the ethical understanding of (...) nursing students and changes in their understanding and approaches to practice over their four years of training (1995-1999). The data collection tools were a questionnaire originally piloted prior to the 1995 study, from which the present study developed, and five vignettes describing ethical dilemmas in health care also piloted in 1995. Students’ thinking progressed as they became more mature as individuals and professionals, although this progress was not necessarily in the direction of greater certainty. Suggestions are made to help nurse educators to maximize the effectiveness of ethics courses in transmitting the skills of ethical reasoning. (shrink)

_Current Issues in Business Ethics_ analyzes the questions which underlie business activities, arguing that the prime object for a legitimate business must be sustainability. It also looks at the issues between individuals and business and asks whether businesses can support their employees as an alternative to family and church. Finally it assesses the impact of most recent trends in business looking at: * the activities of multinational companies * the changing gender balance * privatization * the loss of power of (...) the trade unions. (shrink)

In 1913 Wittgenstein raised an objection to Russell’s multiple relation theory of judgment that eventually led Russell to abandon his theory. As he put it in the Tractatus, the objection was that “the correct explanation of the form of the proposition, ‘A makes the judgement p’, must show that it is impossible for a judgement to be a piece of nonsense. (Russell’s theory does not satisfy this requirement,” (5.5422). This objection has been widely interpreted to concern type restrictions on the (...) constituents of judgment. I argue that this interpretation is mistaken and that Wittgenstein’s objection is in fact a form of the problem of the unity of the proposition. (shrink)

Building on self-professed perspectival approaches to both scientific knowledge and causation, I explore the potentially radical suggestion that perspectivalism can be extended to account for a type of objectivity in science. Motivated by recent claims from quantum foundations that quantum mechanics must admit the possibility of observer-dependent facts, I develop the notion of ‘perspectival objectivity’, and suggest that an easier pill to swallow, philosophically speaking, than observer-dependency is perspective-dependency, allowing for a notion of observer-independence indexed to an agent perspective. Working (...) through the case studies of colour perception and causal perspectivalism, I identify two places within which I claim perspectival objectivity is already employed, and make the connection to quantum mechanics through Bohr’s philosophy of quantum theory. I contend that perspectival objectivity can ensure, despite the possibility of perspective-dependent scientific facts, the objectivity of scientific inquiry. (shrink)

Dynamical Grammar explores the consequences for language acquisition, language evolution, and linguistic theory of taking the underlying architecture of the language faculty to be that of a complex adaptive dynamical system. It contains the first results of a new and complex model of language acquisition which the authors have developed to measure how far language input is reflected in language output and thereby get a better idea of just how far the human language faculty is hard-wired.

The problem of the nature of color is typically put in terms of the following question about the intentional content of visual experiences: what’s the nature of the property we attribute to physical objects in virtue of our visual experiences of color? This problem has proven to be tenacious largely because it’s not clear what the constraints are for an answer. With no clarity about constraints, the proposed solutions range widely, the most common dividing into subjectivist views which hold that (...) attributed colors are mental properties or mental events} and a variety of realist views, which hold that colors are properties of physical objects. These realist views, in turn, divide into views that hold that attributed colors are dispositions of physical objects to produce color experiences (dispositionalism),° nondispositional relations between objects and perceivers (the relational view)," physical properties of physical objects (physicalism),‘ or sui generis properties of physical objects (primitivism and impressionism).‘ I’ll examine a proposed constraint which Mark Johnston (1992) calls Revelation. According to Revelation, the appearance of color in our ordinary visual experience provides us with unqualified access to the nature of color. While every proposal about the nature of color must take a stand on how the.. (shrink)

C. L. Hardin led a recent development in the philosophical literature on color in which research from visual science is used to argue that colors are not properties of physical objects, but rather are mental processes. I defend J. J. C. Smart's physicalism, which claims that colors are physical properties of objects, against this attack. Assuming that every object has a single veridical (that is, nonillusory) color, it seems that physicalism must give a specification of veridical color in terms natural (...) to physics, independently of our interests. Hardin argues that since physicalism doesn't give us any such specification of veridical color, this view is false. However, this argument assumes a mistaken account of veridical color. I show physicalism can appeal to an alternative account, according to which veridical color is characterized in terms of favored conditions of perceptual access, independently of any specification of the physical nature of color. (shrink)

A recent series of experiments have demonstrated that a classical fluid mechanical system, constituted by an oil droplet bouncing on a vibrating fluid surface, can be induced to display a number of behaviours previously considered to be distinctly quantum. To explain this correspondence it has been suggested that the fluid mechanical system provides a single-particle classical model of de Broglie’s idiosyncratic ‘double solution’ pilot wave theory of quantum mechanics. In this paper we assess the epistemic function of the bouncing oil (...) droplet experiments in relation to quantum mechanics. We find that the bouncing oil droplets are best conceived as an analogue illustration of quantum phenomena, rather than an analogue simulation, and, furthermore, that their epistemic value should be understood in terms of how-possibly explanation, rather than confirmation. Analogue illustration, unlike analogue simulation, is not a form of ‘material surrogacy’, in which source empirical phenomena in a system of one kind can be understood as ‘standing in for’ target phenomena in a system of another kind. Rather, analogue illustration leverages a correspondence between certain empirical phenomena displayed by a source system and aspects of the ontology of a target system. On the one hand, this limits the potential inferential power of analogue illustrations, but, on the other, it widens their potential inferential scope. In particular, through analogue illustration we can learn, in the sense of gaining how-possibly understanding, about the putative ontology of a target system via an experiment. As such, the potential scientific value of these extraordinary experiments is undoubtedly a significant one. (shrink)

A first-person proposition is a proposition that only a single subject can assert or believe. When I assert ‘I am on fire’ I assert a first-person proposition that only I have access to, in the sense that no one else can assert or believe this proposition. This is in contrast to third-person propositions, which can be asserted or believed by anyone.

There is ample evidence that speakers’ linguistic knowledge extends well beyond what can be described in terms of rules of compositional interpretation stated over combinations of single words. We explore a range of multiword constructions to get a handle both on the extent of the phenomenon and on the grammatical constraints that may govern it. We consider idioms of various sorts, collocations, compounds, light verbs, syntactic nuts, and assorted other constructions, as well as morphology. Our conclusion is that MWCs highlight (...) the central role that grammar plays in licensing MWCs in the lexicon and the creation of novel MWCs, and they help to clarify how the lexicon articulates with the rest of the grammar. (shrink)

By what moral standards must nation-states select immigration policies? A central contention of Immigration Justice is that the justice of an immigration policy can be ascertained only through consideration of the pervasive, systematic, and unjust inequalities engendered by the institutions that constitute our social world. Immigration policies affect people primarily as members of social groups demarcated from each other by members’ gender, race, and class. For this reason, this book argues that states’ selection of immigration policies is a matter of (...) structural justice, defending the cosmopolitan principle that immigration policies are not just if they avoidably harm social groups that are already unjustly disadvantaged. Via this principle, Immigration Justice challenges the three most widely-held views on immigration justice among philosophers, political theorists and the general public: the moral sovereignty of states view, on which states have moral discretion to select immigration policies by criteria of their own choosing; nationalism, on which states morally must choose immigration policies that promote the national interest; and open borders, the view that states morally ought to eliminate virtually all restrictions on immigration. Instead, this book argues, just immigration policies vary among states in accordance with a variety of contextual factors influencing their consequences for disadvantaged social groups. (shrink)

According to color subjectivism, colors are mental properties, processes, or events of visual experiences of color. I first lay out an argument for subjectivism founded on claims from visual science and show that it also relies on a philosophical assumption. I then argue that subjectivism is untenable because this view cannot provide a plausible account of color perception. I describe three versions of subjectivism, each of which combines subjectivism with a theory of perception, namely sense datum theory, adverbialism, and the (...) virtual color proposal, and argue that each version faces serious objections. Considering these three theories of perception to be exhaustive of those available to the subjectivist, I conclude that subjectivism is untenable and that the scientifically motivated argument for this view is unsound. I then offer the diagnosis that the philosophical assumption on which this argument relies is mistaken. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Capitalism in “Wealthy Hellas”? PETER W. ROSE Josiah ober has taken on the very ambitious task of analyzing a vast swath of ancient Greek history— precisely the periods—as his opening quotation from Byron (1) implies—most admired by those who have devoted any time to the study of Greek antiquity: Fair Greece! sad relic of departed worth! Immortal, though no more! Though fallen, great!1 At the same time, again (...) as suggested by the repetition of Byron’s lines (206, also mentioned on 293), Ober’s book falls within the large category of celebratory works about ancient Greece—like Werner Jaeger’s once popular three volumes of Paideia or, at the outset of the twentieth century, Alfred Zimmern ’s The Greek Commonwealth.2 It does not, on the other hand, fit in with a plethora of relatively recent, relatively short (as opposed to George Grote’s twelve volumes) histories of Greece aimed at the potentially lucrative textbook market for general more comprehensive overviews of Greek civilization.3 As such, the basis on which Ober celebrates ancient Greece merits close scrutiny. history and the overriding thesis ober’s conception of “history” here is heavily weighted towards the theoretical elaboration and justification of an Josiah Ober, The Rise and Fall of Classical Greece (Princeton University Press 2015), hardback, 415 pages. A truncated, arbitrarily reorganized version of this review appeared in New Left Review 103 (2017) 139–49. Thanks to Daniel Tompkins for full comments on an earlier version, and to Peter Green and Stephen Hodkinson for clarifications on specific points. arion 26.3 winter 2019 overriding thesis. Five initial chapters of a total of eleven are devoted to that task before five chronologically focused chapters, which offer a cursory romp through Greek history from ca. 1000 BCE to 334 BCE and some brief suggestions about the period down to the decisive takeover of Greece by Rome, usually dated to 31 BCE. The volume is capped by a final summary and overview chapter. Ober is admirably forthright about his agenda. Immediately in his preface he declares, “in states where citizens keep rulers in check, public authority protects individual rights and the rule of law pertains most of the time. These political conditions promote economic growth. The conjunction of democratic politics and a strong economy is, in practice, available only to affluent citizens of highly developed countries.... Democracy and growth define the normal, although not yet the usual, conditions of modernity” (xiii, my emphasis).4 This somewhat utopian conception of the present-day interface of democratic institutions and economic growth—posited as an unquestioned desideratum in sublime disregard of “ecology” in the literal sense5—underlies Ober’s whole project. While acknowledging the obvious negatives of ancient slavery,6 “denial of rights to women, and glorified war,” he argues “if we are interested in the conjunction of political and economic exceptionalism, we must start somewhere, and classical Greece was the society in which the wealth-and-democracy package first emerged in a form that can be studied in depth” (xv). Athenian democracy has been at the center of Ober’s impressive scholarly career at least since the publication of his study of fourth-century BCE Athenian rhetoric, Mass and Elite in Democratic Athens (Princeton 1989). “Athens” or “democracy” have featured in the titles of all his subsequent book publications7—not to mention the extraordinary output of more specialized essays in multiple venues. One overriding question about his latest book is whether the unique phenomenon of Athenian democracy is being unduly generalized to “Classical Greece.” 142 capitalism in “wealthy hellas”? The special focus of his interest here in ancient Greece, the “conjunction of political and economic exceptionalism,” is further clarified in his opening chapter which begins with the quotation from Byron cited above: “Byron’s vision of greatness was inspired by ancient Greek cultural and intellectual achievement: art and architecture, literature, visual and performance art, scientific and moral thought.... Hellas was great because of a cultural accomplishment that was supported by sustained economic growth. That growth was made possible by a distinctive approach to politics” (1–2). Greek cultural achievements, however, are bracketed (and in practical terms dismissed)8 in favor of the “wealth-anddemocracy... (shrink)

Socrates presents philosophy as an intrinsically valuable process, which renders human life valuable even if no human being attains complete knowledge. I show first that Plato viewed an ongoing commitment to dialogue as the key to a good life and to justice, both for the individual and for society. Second, I trace possible applications of this view of philosophy as ongoing dialogue to the contemporary philosophy curriculum. I discuss two specific apphcations: exposing the curriculum to Afrocentric challenges and insisting upon (...) the liberating power of the discussions of justice presented by the ancients. (shrink)

In order for a state to rightfully exercise self-determination by means of setting policies concerning migrants and migration, they must be legitimate, Gillian Brock argues in _Justice for People on the Move_. Legitimacy, in Brock’s view, requires that states satisfy three (jointly sufficient) conditions: they must respect their own citizens’ human rights; they must be a part of a legitimate state system; and they must adequately contribute to the maintenance of this state system. In her new book, Brock also argues (...) persuasively for a variety of migration-related policies that states ought to adopt (concerning, for example, addressing the needs of refugees, regularization of undocumented migrants, and protections for temporary labor migrants). In previous work (Brock, _Global Justice: A Cosmopolitan Account_, Oxford University Press, New York, 2009; Brock and Blake, _Debating Brain Drain: May Governments Restrict Emigration?_, Oxford University Press, New York, 2015), Brock has compellingly defended the justice of policies designed to allay the harmful effects of brain drain. In this commentary, I wish to argue that the legitimacy standard Brock defends in _Justice for People on the Move_ is an obstacle to the justified adoption of the migration-related policies Brock demonstrates here and in previous work to be substantively morally justified, if not required by justice. If a state is not legitimate, then it lacks the moral standing to adopt migration policies that are otherwise morally justified. I do not intend to question the importance of the concept of state legitimacy for political philosophy generally. However, I wish to argue that that in the context of migration justice, considerations of state legitimacy may be contrary to the goal of defending a view on what policies a state ought to adopt. It may be more useful simply to consider whether or not there is moral justification for a particular state to adopt a particular policy. (shrink)

Karl Marx’s acerbic observation in the opening lines of _The Eighteenth Brumaire_ that “all facts and personages of great importance in world history occur the first time as tragedy, the second as farce” may be profitably applied to a reconsideration of literary farce sui generis, a genre represented in this article by a long-neglected work of utopian fiction, Archibald Marshall’s _Upsidonia_ (1915). Although _Upsidonia_’s current disregard is arguably undeserved, the article’s chief interest is not to reclaim the novel on aesthetic (...) grounds but to illuminate the mechanics of what Marx would call its “serious buffoonery.” In its persistent reversal of capitalist principles and relations, _Upsidonia_ naturally invites readers to revisit Marx, whose mordant gambit may serve as a key to Marshall’s own farcical plot and praxis, rooted in return and repetition, the essential maneuvers of farce itself. (shrink)

The literature on conditionals is rife with alternate formulations of the abstract semantics of conditional logic. Each formulation has its own advantages in terms of applications and generalizations; nevertheless, they are for the most part equivalent, in the sense that they underwrite the same range of logical systems. The purpose of the present note is to bring under this umbrella the partition semantics introduced by Brian Skyrms in (Skyrms, 1984).

Using student self-reported cheating admissions and answers from a hypothetical cheating scenario, this paper analyzes the effects of individual and situational factors on potential cheating behavior. Results confirm several conclusions about student factors that are related to cheating. The probability of cheating is associated with younger students, lower GPAs, alcohol consumption, fraternity/sorority membership, and having cheated in high school. Student perceptions of the certainty and severity of punishment appear to have a negative and significant impact on the probability of cheating (...) on in-class assignments. Students who report a belief that cheating is never acceptable appear to be significantly less likely to cheat in any circumstance. This study illustrates the context-dependent nature of academic dishonesty, and the associated difficulty in understanding the relationships between measurable factors and cheating behavior. (shrink)

본고는 반성에 대한 리오타르의 후기 저작 두 가지를 논한다. 리오타르는 그의 칸트 독해에서 반성 개념에 대해 논한 바 있다. 본고는 그 중 칸트의 숭고미에 대하여 를 리오타르의 보다 이전의 저술인 비인간 에 포함된 에세이, “Si l’on peut penser sans corps” 와 관련하여 논한다. 이는 칸트의 반성에 대한 리오타르의 보다 자세한 논의인 칸트의 숭고미에 대하여 를 보다 넓은 차원에서 이해하고자 하는 시도이다. 이를 위해 본고는 후기 리오타르 사상에서 주요하게 등장하는, 사유와 신체 모두와 연관을 맺는 정념 개념에 주목한다.

I propose a strategy for a metaphysical reduction of perceived color, that is, an identification of perceived color with properties characterizable in non-qualitative terms. According to this strategy, a description of visual experience of color, which incorporates a description of the appearance of color, is a reference-fixing description. This strategy both takes color appearance seriously in its primary epistemic role and avoids rendering color as metaphysically mysterious. I’ll also argue that given this strategy, a plausible account of perceived color claims (...) that colors are physical properties of physical objects. (shrink)

I argue that phenomenal externalism is preferable to phenomenal internalism on the basis of externalism's explanatory power with respect to qualitative character. I argue that external qualities, namely, external physical properties that are qualitative independent of consciousness, are necessary to explain qualitative character, and that phenomenal externalism is best understood as accepting external qualities while phenomenal internalism is best understood as rejecting them. I build support for the claim that external qualities are necessary to explain qualitative character on the basis (...) of a model of color perception as a certain sort of information filter by which perceivers gain access to external qualities. (shrink)

One possible way of dealing with the strange art of rhetoric is to claim one knows nothing about it. This is the tack taken by Chaucer's Franklin in his prologue to his Canterbury tale.

_Current Issues in Business Ethics_ analyzes the questions which underlie business activities, arguing that the prime object for a legitimate business must be sustainability. It also looks at the issues between individuals and business and asks whether businesses can support their employees as an alternative to family and church. Finally it assesses the impact of most recent trends in business looking at: * the activities of multinational companies * the changing gender balance * privatization * the loss of power of (...) the trade unions. (shrink)

How should we characterize the nature of perceptual experience? Some theorists claim that colour experiences, to take an example of perceptual experiences, have both intentional properties and properties called 'colour qualia', namely, mental qualitative properties which are what it is like to be conscious of colour. Since proponents of colour qualia hold that these mental properties cannot be explained in terms of causal relations, this position is in opposition to a functionalist characterization of colour experience.

This chapter examines the spectrum inversion hypothesis as an argument against certain kinds of account of what it’s like to be conscious of color. The hypothesis aims to provide a counterexample to accounts of what it’s like to be conscious of color in non-qualitative terms, as well as to accounts of what it’s like to be conscious of color in terms of the representational content of conscious visual states (which, according to some philosophers, is in turn given an account in (...) non-qualitative terms). I explain the hypothesis’s reasoning in sections 1 and 2. I then take up background issues: since the counterexample provided by the hypothesis is typically given as a possibility rather than an actuality, I briefly discuss the kind of possibility involved in section 3, and the methodologies used to evaluate the plausibility of possibilities in section 4. In section 5, I describe some general considerations that are commonly used against the spectrum inversion hypothesis. I take up attempts to support the hypothesis with findings from color science in section 6. I end with comments skeptical of both the motivation for the spectrum inversion hypothesis and the methodology used to support it. (shrink)

The various theories about business ethics need to take much more notice of technology, realising that technology has its own increasing momentum which is driving business, and that, whereas business people think they control technology as a simple neutral means to their ends, in fact the reverse is true: business is the servant of technological development. Jacques Ellul, however, offers some hope for the future to help us ‘reappropriate our humanity’. Dr Davies is a senior lecturer in Strategic Management and (...) Business Ethics at the Buckingham Business School, Buckinghamshire College [a College of Brunel University], Newland Park Campus, Gorelands Lane, Chalfton‐St‐Giles, Buckinghamshire HP8 4PB . His background is in mining and production engineering and he would like to hear from others interested in the new field of engineering ethics. (shrink)

The problem of the source of necessity is the problem of explaining what makes necessary truths necessarily true. Simon Blackburn has presented a dilemma intended to show that any reductive, realist account of the source of necessity is bound to fail. Although Blackburn's dilemma faces serious problems, reflection on the form of explanations of necessities reveals that a revised dilemma succeeds in defeating any reductive account of the source of necessity. The lesson is that necessity is metaphysically primitive and irreducible.