There are a number of different versions of Reductive Nominalism, versions distinguished by the way in which each accounts for facts about having and sharing properties. This chapter discusses three broad varieties of Reductive Nominalism: Predicate Nominalism, Class Nominalism, and Resemblance Nominalism. Class Nominalism identifies properties with classes or sets. Resemblance Nominalists come in two sub‐varieties, depending on whether they take the resemblance relation to hold between particular properties (called 'tropes') or particular (...) things that have properties (ordinary particulars). Trope Theory comes in two varieties depending on whether one plumps for universals. It should not be difficult to see that Extreme Resemblance Nominalism is faced with Class Nominalism's extensionality problems, both the problem of contingent predication and the co‐extensive property problem. Resemblance Nominalists can reply by insisting on a distinction between a priori or conceptual equivalence and metaphysical equivalence. The chapter focuses on the extensionality problems for Class Nominalism. (shrink)

Biological naturalism claims that all psychological phenomena can be causally, though not ontologically, reduced to neurological processes, where causal reduction is usually understood in terms of supervenience. After presenting John Searle’s version of biological naturalism in some detail, I argue that the particular supervenience relation on which this account depends is dubious. Specifically, the fact that either realism or nominalism is the case implies that there is one fact about belief that does not supervene on neurophysiological processes. Biological naturalism (...) is thereby defeated because it cannot account for belief. Ialso address three likely objections to this argument. (shrink)

This paper confronts a certain modern view of the relation between semantics and ontology with that of the late-medieval nominalist philosophers, William Ockham and John Buridan. The modern view in question is characterized in terms of what is called here “the thesis of onto-semantic parallelism,” which states that the primitive (indefinable) categorematic concepts of our semantics mark out the primary entities in reality. The paper argues that, despite some apparently plausible misinterpretations to the contrary, the late-medieval nominalist program of “ontological (...) reduction” was not driven by considerations that try to “read off” ontology from semantic analysis or those that try to identify semantic primitives in their search for ontological primitives. The medieval authors presented a much more flexible, dynamic view of “Aristotelian naturalism,” which challenges both of the unappealing modern alternatives of “conceptual tribalism” and “conceptual imperialism.”. (shrink)

L’article retrace l’historique des recherches menées en sociologie sur l’artification, et identifie les principaux obstacles qu’il a fallu surmonter pour les mener à bien : la confusion avec la notion d’artialisation, la réduction à un usage simplement métaphorique, et le rabattement sur le concept de légitimation. Soulignant la connexion étroite entre la problématique de l’artification et le nominalisme en philosophie, il argumente en faveur d’une conception foncièrement nominaliste de la sociologie, à travers ses trois déclinaisons contemporaines que sont le constructivisme, (...) le pragmatisme et l’individualisme méthodologique. Il plaide pour finir en faveur d’une prise au sérieux des représentations mentales dans le programme sociologique, congruente avec l’approche nominaliste. (shrink)

David Lewis is typically interpreted as a class nominalist. One consequence of class nominalism, which he embraced, is that the reduction of ordered pairs, triples, etc to unordered sets of sets is conventional. The reaction by his Australian counterparts D.M. Armstrong and Peter Forrest was that Lewis was not being ontologically serious. This chapter evaluates this debate over serious ontology. It is argued that in one sense Lewis is ontologically serious, but that his additional commitment to structuralism about classes (...) should push him to adopt a trope-theoretic account of naturalness, which opens up another way to respond to the charge of not doing serious ontology. This conclusion is supported by certain remarks he makes in his correspondence, thus revealing how his thinking about properties appears to have evolved from property-egalitarianism to a sparse theory of tropes. (shrink)

Abstract Nominalists, denying the reality of anything over and above concreta, are committed to a reductive account of any law of nature, explaining its necessity?the fact that it not only holds for all actual instances, but would hold for any additional ones?in, for example, epistemic terms (its likelihood/certainty of holding beyond the already observed instances). Nominalists argue that the world would be no different without irreducible modalities. ?Modal realists? often object that this parallels a common phenomenalist argument against believing (...) in a mind?independent external world. However, phenomenalism without translatability into sensory language is incoherent, though any such translation is impossible. The ?as if philosophy is untenable as well. But it is quite possible to formulate inductive methodology's imperatives in non?modal terms. Modal realism purports to give a reason against inductive scepticism, but does not go beyond saying that there is one. (shrink)

This paper is an investigation into what could be a goodexplication of ``theory S is reducible to theory T''''. Ipresent an axiomatic approach to reducibility, which is developedmetamathematically and used to evaluate most of the definitionsof ``reducible'''' found in the relevant literature. Among these,relative interpretability turns out to be most convincing as ageneral reducibility concept, proof-theoreticalreducibility being its only serious competitor left. Thisrelation is analyzed in some detail, both from the point of viewof the reducibility axioms and of modal logic.

Husserl’s first work formulated what proved to be an algorithmically complete arithmetic, lending mathematical clarity to Kronecker’s reduction of analysis to finite calculations with integers. Husserl’s critique of his nominalism led him to seek a philosophical justification of successful applications of symbolic arithmetic to nature, providing insight into the “wonderful affinity” between our mathematical thoughts and things without invoking a pre-established harmony. For this, Husserl develops a purely descriptive phenomenology for which he found inspiration in Mach’s proposal of a (...) “universal physical phenomenology.” To account for applications to any domain, Husserl envisages a theory of all possible deductive systems, which he develops extensively in his Göttingen lectures wherein he engages with Hilbert’s work on deductive systems for geometry, real arithmetic, and physics. This leads Husserl to formulate claims of decidability and proofs of completeness for various arithmetics that result from his analysis of Kronecker’s general arithmetic. Careful attention to these proofs seem to show that Husserl was not oblivious to problems that underlie our incompleteness theorems, namely that of showing that some inversions of his algorithmic arithmetic are undefined. His growing preoccupation with the issue of a pre-established harmony between mathematical thought and reality motivate his pursuit of a “supramathematics” of all possible complete theory forms to demystify such harmony, by having such a form on hand for describing any empirical domain. He soon decides that a transcendental idealism of nature will reveal the wonderful affinity of thoughts and things comprising such harmony, to be a wonderful “parallelism of objective unities and constituted manifolds of consciousness.” But the paradoxes of logic and set theory cloud the clarity of mathematics, which Weyl would restore with Brouwer’s intuitionism and Hilbert with his metamathematics. Husserl informed Weyl that his student Becker had formulated a phenomenological foundation not only for Weyl’s generalization of relativity theory but also for the Brouwer-Weyl continuum. But Weyl eventually rejected much of Becker’s work, especially when it became clear that his phenomenological intuitionism could not account for the success of Hilbert’s transfinite mathematics in quantum physics. Becker responded to this “crisis of phenomenological method” with his mantic phenomenology celebrating the magic of mathematical mysticism, which Husserl finally rejects in favor of a pluralistic phenomenology of mathematics and nature. (shrink)

Common representational content allows the Buridanian classification of human concepts discussed in the fourth chapter, which provides the first thoroughgoing, systematic survey of Buridan’s conception of a mental language. The chapter discusses the divisions of concepts into syncategorematic and categorematic, simple and complex, absolute and connotative, and singular and common concepts. Besides presenting these classifications, the chapter provides a detailed discussion of the idea of conceptual complexity as semantic compositionality, its role in Buridan’s nominalist program of “ontological reduction,” and his (...) precarious positioning of his account of the distinction between the representational contents of universal and singular concepts “somewhere between” those of Ockham and Aquinas. The discussion relates the emerging issues to contemporary concerns in the philosophy of mind and language, such as the possibility of forming genuinely singular concepts and simple substantial concepts that would allow some terms of our language to function as rigid designators; the differences between consciousness and mental content; and the problem of universal representation without real universals. (shrink)

In this paper I shall argue two things. First, it is plausible to think that Conceptualism holds with respect to propositions; in any event, it does a much better job than its closest competitors (Platonism and Nominalism) in accounting for the truthbearing nature of propositions. Secondly, it is wholly implausible (so I say) to take the added step and equate properties and relations with divine concepts. Here I offer additional reasons, beyond “divine bootstrapping,” for theists to resist this tempting (...) reduction. Thus, a limited Conceptualism emerges as the most natural and defensible way for a theist to think about God’s relation to abstract objects. (shrink)

When I first began to take an interest in the debate over nominalism in philosophy of mathematics, some twenty-odd years ago, the issue had already been under discussion for about a half-century. The terms of the debate had been set: W. V. Quine and others had given “abstract,” “nominalism,” “ontology,” and “Platonism” their modern meanings. Nelson Goodman had launched the project of the nominalistic reconstruction of science, or of the mathematics used in science, in which Quine for a (...) time had joined him before turning against him. William Alston, Rudolf Carnap, and Michael Dummett had raised doubts about what the point of Goodman’s exercise could be, and though they had unfortunately been largely ignored, Quine’s contention that the exercise cannot be successfully completed had gained wide publicity as the so-called “indispensability” argument against nominalism. By contrast, two subtle discussions of Paul Benacerraf had been appropriated by nominalists and turned into the so-called “multiple reductions” and “epistemological” arguments for nominalism. (shrink)

In 1980 a very interesting exchange of views between three distinguished philosophers took place. Two years earlier Armstrong had, in his already classical two-volume book on universals (Armstrong 1978a, 1978b), mentioned, in passing, Quinean positions as ”Ostrich or Cloak-anddagger Nominalism”, by which he referred to philosophers who refuse to countenance universals but who at the same time see no need for any reductive analysis. In the symposium in question (’Symposium: Nominalism’, Pacific Philosophical Quarterly 61 (1980)), Michael Devitt (...) defended vigorously the Quinean position and attacked Armstrong’s view (Devitt 1980); Armstrong naturally replied (Armstrong 1980), and Quine himself joined in with a short note (Quine 1980a). But interesting as these contributions are, the opinions have not exactly converged. (shrink)

Montaigne est un philosophe et un philosophe difficile. Un philosophe ce n'est pas parce que les Essais ne suivent pas un ordre systématique, qu'ils ne relèvent pas de l'histoire de la philosophie. Un philosophe difficile. Pourquoi, en effet, les Essais ont-ils été souvent laissés dans les marges inexploitées de l'histoire de la philosophie? À cause d'une particularité, consciemment revendiquée, de leur auteur: pour comprendre Montaigne lui-même, sa propre situation philosophique nous impose de le comprendre immédiatement. Il était donc urgent de (...) s'appliquer à retrouver certains des contextes des Essais, en particulier l'arrière-fond scolastique, trop longtemps exclu des études montanistes. Mais aussi de leur appliquer un principe herméneutique, aussi simple qu'indiscutable en histoire de la philosophie : aller du plus clair au plus obscur, de ce qui est conceptuellement le mieux établi au plus problématique. En l'occurrence, aller du XVIIe siècle, singulièrement de Descartes, aux Essais : accéder au je de Montaigne à partir de l'ego cartésien et par différence avec lui ; plus encore, y accéder, avec et par-delà l'ego cartésien, à partir de l'ego transcendantal et de la réduction phénoménologique. Bref, lire conceptuellement et philosophiquement un philosophe. Le présent volume réunit donc des études d'approches différentes et complémentaires. Il vise d'abord à rapprocher Montaigne de ses lectures antiques - y compris celles dont on ne soupçonne pas ordinairement que Montaigne les a faites. Il entend ensuite confronter les Essais à la scolastique - le Dieu de Montaigne n'est peut-être pas si éloigné qu'on l'a cru du Dieu de certains Nominalistes, voire du Dieu cartésien, libre créateur des vérités éternelles. En résulte une détermination nouvelle du scepticisme de Montaigne, qui permet de mieux mesurer son irréductibilité à ses modèles antiques. Enfin, il s'interroge sur la pertinence actuelle de l'attitude philosophique de Montaigne, en le faisant dialoguer avec d'autres philosophes qui ne furent pas ses contemporains, mais qui sont les nôtres, et sans lesquels il n'est pas aujourd'hui de philosophie - singulièrement la phénoménologie. C'est en excédant les catégories dans lesquelles l'historiographie a voulu l'enfermer et les faux problèmes qu'elle ne cesse de lui poser, qu'un philosophe se révèle pleinement, Montaigne. (shrink)

In the present paper I want to give an interpretation of Brentano's late, nominalistic ontology. There are two aspects of this theory: the conception of individual properties containing their substances, presented mainly in the fragments collected in Brentano's Theory of Categories and the conceptualistic reduction virtually involved in Brentano's definition of truth.

A ‘state of affairs’ is understood here as any kind of concrete entity that can play the role of truthmaker. Different ontologies propose different structures of entities to work as ‘states of affairs’ in this sense. Defenders of universals will propose for the role non- mereological structures of universals, objects and times. Defenders of tropes will propose tropes, either with or without universals and objects. Resemblance nominalists will propose primitive ontological facts of resemblance between objects in time. In any of (...) these cases, times are an essential component of a state of affairs. Any ontology of states of affairs, then, should clarify what times are in order to clarify what states of affairs are. An examination of the dominant reductivist conceptions of times shows that these connections have not yet been thought through carefully. In any of the dominant reductivist conceptions, times are entities that either include or describe everything that happens simultaneously at a given instant. Even in some cases they include the description of everything that happens at any time. If one introduce times taken as they are in any of these reductivist conceptions, it will be essential to a state of affairs everything that happens simultaneously with it, or even everything that happens at any time. Under some assumptions the internal relation of every state of affairs with every other state of affairs expands to the internal relation of everything with everything. This is an unhappy theoretical situation that calls for a more careful consideration of some central tenets in our ontology of time. (shrink)

A ‘state of affairs’ is understood here as any kind of concrete entity that can play the role of truthmaker. Different ontologies propose different structures of entities to work as ‘states of affairs’ in this sense. Defenders of universals will propose for the role non- mereological structures of universals, objects and times. Defenders of tropes will propose tropes, either with or without universals and objects. Resemblance nominalists will propose primitive ontological facts of resemblance between objects in time. In any of (...) these cases, times are an essential component of a state of affairs. Any ontology of states of affairs, then, should clarify what times are in order to clarify what states of affairs are. An examination of the dominant reductivist conceptions of times shows that these connections have not yet been thought through carefully. In any of the dominant reductivist conceptions, times are entities that either include or describe everything that happens simultaneously at a given instant. Even in some cases they include the description of everything that happens at any time. If one introduce times taken as they are in any of these reductivist conceptions, it will be essential to a state of affairs everything that happens simultaneously with it, or even everything that happens at any time. Under some assumptions the internal relation of every state of affairs with every other state of affairs expands to the internal relation of everything with everything. This is an unhappy theoretical situation that calls for a more careful consideration of some central tenets in our ontology of time. (shrink)

John Wyclif claims that there are relations of essential identity and formal distinctness connecting universals, complexly signifiables, and individuals. In some respects Wyclif's position on complexly signifiables coincides with what I call the advanced res theory, the view that complexly signifiables are really identical with but formally distinct from worldly individuals. But there is no question in Wyclif's treatment of a reduction of complexly signifiables to individuals. I argue that Wyclif populates his most fundamental ontological level with propositionally structured entities (...) both individual and universal, and that this approach is superior to that of its nominalist rivals. But Wyclif shares with other versions of the advanced res theory an implausible theory of identity, and this affects the coherence of the claimed real identity between individuals and complexly signifiables. (shrink)

An account of predicate reference is presented which attempts to steer a middle course between reductionism, which construes the notion in terms of speakers' inclinations, and {transcendent) realism, which construes the notion in terms of properties. It is first introduced in the context of a discussion of the accounts of length (distance) advanced by Hans Reichenbach, Adolf Grünbaum and Hilary Putnam. A general account of predicate reference is then developed that explains the notion in terms of speakers' inclinations, while rejecting (...) the idea that this explanation should take the form of a reduction. The view is presented as a vindication of extreme nominalism, as it explains predicate reference solely in terms of the notion of qualia introduced by C.I. Lewis and developed by Nelson Goodman, which, it is argued, is definable in terms of speakers' classificatory propensities. Some connections are explored between the position that is presented and the views of Michael Dummett, John McDowell, Mark Johnston and Hilary Putnam, among others. (shrink)

Logic is traditionally considered to be a purely syntactic discipline, at least in principle. However, prof. David Isles has shown that this ideal is not yet met in traditional logic. Semantic residue is present in the assumption that the domain of a variable should be fixed in advance of a derivation, and also in the notion that a numerical notation must refer to a number rather than be considered a mathematical object in and of itself. Based on his work, the (...) central question of this thesis is what kind of logic, if any, results from removing this semantic residue from traditional logic.We differ from traditional logic in two significant ways. The first is that the assumption that a numerical notation must refer to a number is denied. Numerical notations are considered as mathematical objects in their own right, related to each other by means of rewrite rules. The traditional notion of reference is then replaced by the notion of reduction (by means of the rewrite rules) to a normal form. Two numerical notations that reduce to the same normal form would traditionally be considered identical, as they would refer to the same number, and hence they would be interchangeable salva veritate. In the new system, called Buridan-Volpin (BV), the numerical notations themselves are the elements of the domains of variables, and two numerical notations that reduce to the same normal form need not be interchangeable salva veritate, except when they are syntactically identical (i.e., have the same Gödel number).The second is that we do away with the assumption that the domains of variables need to be fixed in advance of a derivation. Instead we focus on what is needed to guarantee preservation of truth in every step of a derivation. These conditions on the domains of the variables, accumulated in the course of a derivation, are combined in a reference grammar. Whereas traditionally a derivation is considered valid when the conclusion follows from the premisses by way of the derivation rules (and possibly axioms), in the BV system a derivation must meet the extra condition that no inconsistency occurs within the reference grammar. For if the reference grammar were to give rise to inconsistency (i.e., it would be impossible to assign domains to all the variables without breaking at least one of the conditions placed on them in the reference grammar), there is no longer a guarantee that truth has been preserved in every step of the derivation, and hence the truth of the conclusion is not guaranteed by the derivation.In Chapter 2 the BV system is introduced in some formal detail. Chapter 3 gives some examples of derivations, notably totality of addition, multiplication and exponentiation, as well as a lemma needed for the proof of Euclid’s Theorem. These examples, taken from prof. Isles’ First-Order Reasoning and Primitive Recursive Natural Number Notations, show that there is a real proof-theoretical difference between traditional logic and the BV system. Here we also find the first major point of departure between myself and prof. Isles, centered on the notion of inheritance of conditions in the reference grammar by way of lemmata. These different points of view are best illustrated in the sections on the totality of exponentiation and on Euclid’s Lemma: prof. Isles maintains that the proof of totality of exponentiation is not BV valid, while I maintain that it is. But I do agree with him that the traditional proof of Euclid’s Lemma is not BV valid. Chapter 6 also expands the arguments for my choice in this matter.Now that it has been shown that there is a difference between traditional logic and BV, the properties of BV need to be examined. In Chapter 4 we give a proof of Cut-elimination for BV minus induction and the subformula property for BV, which allows us to prove the consistency of BV minus induction. We also expand on the reasons for excluding induction. In Chapter 5 we consider in detail the proof of a finite analog to the Löwenheim–Skolem theorem given by prof. Isles in his article with the same title. He proves that under certain conditions it is always possible, given the existence of a (possibly uncountable) model for a derivation, to give a finite model for this derivation. The system he considers deviates from BV as considered in this thesis in two significant ways: it does not contain the induction rule and the domains contain numbers instead of numerical notations. We then go on to show that it is possible to extend the result to include induction, in the sense that the existence of a possibly uncountable model for a derivation guarantees the existence of a model that is at most countable. We also consider the complications that arise from taking numerical expressions instead of numbers as the elements of domains.Finally, in Chapter 6 we consider the philosophical consequences of the BV system, informed by the formal results from the previous chapters. In particular we discuss the relation between reduction and reference, the status of reference grammars, the notion of induction and its function within BV, and some brief considerations on the consequences of the BV system for the discussion regarding nominalism and realism with regard to mathematical objects. The object of the chapter is twofold. On the one hand applying the formal results to philosophical questions, on the other hand arguing that BV is not just a theoretically acceptable alternative to traditional logic, but is in fact deserving of further development and research into its properties. The latter will probably appeal most to those of a nominalist and/or finitist bent.Abstract prepared by Harrie de Swart and Sven Storms.E-mail:[email protected]:https://research.tilburguniversity.edu/files/6170 1294/Storms_The_Buridan_Volpin_04_05_2022.pdf. (shrink)

Obviously, science matters to philosophy. But is philosophy also constrained by science? Naturalism is roughly the view that answers positively. However, even among proponents of naturalism, how science constrains philosophy has always been (and still is) a subject of debate. There are two basic dimensions in which the debate takes place, which give rise to two different kinds of naturalism: ontological and methodological. The former concerns what there is, while the latter deals with the methods whereby we acquire knowledge and (...) beliefs. Ontological Naturalism is loosely the view that all of what there is belongs to the natural world, where the natural world is the world described by the natural sciences. By maintaining, in turn, that the ultimate structure of the world is what the natural sciences say it to be, it is to some extent close to Physicalism, according to which what most fundamentally exist are the entities and properties posited by basic physics. On the other hand, methodological naturalism is often thought of as making an epistemological claim akin to scientism—the claim that the best (perhaps the unique) approach to acquiring knowledge is that of natural sciences. Accordingly, it holds that the very same methods used to arrive at scientific theories are the only legitimate ones to be employed by philosophy.Each of these horns of naturalism implies important consequences for our understanding of the relationship between science and many areas of philosophy, including metaphysics. From the methodological point of view, naturalism might be said to entail the denial that our conception of reality needs to include whatever is exclusively accessible to metaphysical theorizing (or to “first philosophy”), understood as a distinct mode of inquiry that lacks ties to the results and practices of the sciences. Indeed, methodological naturalism is usually assumed to reject the project of a priori theorizing, and it is perhaps hard to see how the traditional metaphysics, as well as current analytical metaphysics, might be in the business of developing and assessing synthetic theories of the world supported by a posteriori evidence. From the ontological point of view, naturalism sees science as already giving us a full account of everything, including our place within that picture. Despite this, the debate around the nature of metaphysics remains very much alive (and complex), spreading its influence all across philosophy and our view of the world. The upshot is that much of metaphysical work is nowadays motivated by the naturalist desire to accommodate what the natural sciences have taught us about the world. This special issue stems exactly from the ongoing debate between naturalist and non-naturalist metaphysicians and aims to assess the prospects of naturalized projects in metaphysics and their relationships to traditional metaphysics.Are science and metaphysics separable enterprises? Should allowable metaphysical theories be constrained by and continuous with natural sciences? Does successful scientific research presuppose metaphysics? These are some of the questions addressed in the contributions comprising this special issue. In response, most of them undertake theoretical commitments of a general naturalist stamp, others challenge their philosophical cogency, while still others discuss and contrast the various versions of naturalism that are currently at the center of many metaphysical debates—which often involve some mixture of the two above-mentioned ones, in different proportions. As a result, this special issue hopes to represent the state of the art drawn from different perspectives, helping somehow to clarify extent and ongoing work in metaphysics with respect to the challenges posed by naturalist thinking and eventually to pave the way for future developments and discussions.The issue opens with Don Ross's paper “A flexible, sloppy blob? Ontology, AI, and the role of metaphysics.” In it, Ross defends a naturalized metaphysics that, in contrast with traditional metaphysical projects, is driven directly by fundamental physics. Therefore, since fundamental physics is taken to be the authoritative source of knowledge on the general structure of the universe, metaphysics should neither be separated from nor transcend it. In particular, he rejects more recent works on building metaphysical foundations for applied ontology—e.g., metaphysics for the foundations of AI—as somehow apt to vindicate the value of analytic metaphysics for the edifice of human knowledge. At the same time, however, he points out how his naturalist (methodological) naturalist approach neither incorporates nor implies a physicalistic reduction.Ferdinando Ceravolo and Steven French, in their contribution “What is a Naturalized Principle of Composition?” also support the project of a methodologically naturalized metaphysics. They focus on Van Inwagen's General Composition Question (GCQ). Specifically, they address the issue concerning whether GCQ could be underpinned by principles that are found to be naturalistically acceptable—that is, constrained and informed by advanced physical knowledge. Arguing positively, they outline two candidates for naturalistically accredited principles of composition and explore the various costs of choosing between them.Along the same lines, in his essay “Naturalism and the Question of Ontology,” Javier Cumpa argues for a naturalistic approach in metaontology based on the project of Wilfrid Sellars. He proposes a naturalistic criterion of relational substantivity for ontological questions, which is held to be naturalistic insofar as it relies on the epistemic value and the degree of understanding of the world in line with science that those questions provide us. Cumpa's view is certainly methodologically naturalist, however, although ontologically he does not seem to be committed to metaphysical notions such as ontological categories, he endorses what he calls an “Impure Eliminativism about Categories.”A more straightforward version of eliminativism is advocated by Otávio Bueno in his chapter “Dispensing with Facts, Substances, and Structures.” He contends that, even though ontological categories (i.e., structures, substances, and facts) play a central role in metaphysical theorizing, we do not need to be committed to their existence. Unlike metaphysical realists – who see true thought or assertion as adequately shaped in terms of the correct representation of completely thought and/or language independent bits of reality – he accounts for metaphysical discourse by offering a naturalist account of the linguistic practice that govern it, but without the ontological commitments that realism recommends. Nevertheless, by dropping realism he does not aim to drop metaphysics as an important form of understanding the world. In order to qualify metaphysical judgements as meaningful, he explores and invokes a distinctive deflationary strategy. The result is a view that takes metaphysical discourse literally but without ontologically inflationary maneuvers.The same deflationary strategy is pursued by Anjan Chakravartty in his piece “Last Chance Saloons for Natural Kind Realism.” But rather than on ontological categories in general, he focuses on natural kinds, arguing against realist views that contend for their mind-independent existence. Nevertheless, he shows how a deflationary approach to kinds, while rejecting kind realism, can be integrated with broader realist doctrines such as scientific realism. That is, we need not be committed to either the existence of these posits or with the metaphysically inflationary interpretations that support them in order to invoke these items in scientific theorizing and to vindicate as objective or mind-independent the truth or falsity of scientific as well as everyday claims about natural kinds.In contrast to the previous standpoints, in her article “Metaphysics as Essentially Imaginative and Aiming at Understanding,” Michaela M. McSweeney defends a non-naturalist view of metaphysics. She explores the idea that metaphysics is essentially imaginative and (at least in part) “up to us.” But treating metaphysics as essentially imaginative makes metaphysics methodologically different from scientific inquiry and more akin to art. Nevertheless, she maintains, it can still be deemed epistemologically valuable to the extent that imagination can lead to understanding. On her view, the central goal of the metaphysical project thus turns out to be understanding rather than truth.The closing paper of the issue investigates precisely the relationship between methodological naturalism and ontological naturalism. In “Methodological naturalism undercuts ontological naturalism,” Peter Forrest argues that the combination of ontological with methodological naturalism is untenable. According to his view, one way to defend ontological naturalism is to retain a version of nominalism: specifically, what he calls Redundancy Nominalism (a kind of deflationary nominalism). On the other hand, methodological naturalism requires adopting Categorial Realism. This means being a realist about universals in at least a minimal way. As a result, the fundamental description that methodological naturalism requires proves be contrary to ontological naturalism, whose precondition, in turn, is not available to methodological naturalists. This leads him to criticize ontological naturalism as a belief but, at the same time, to vindicate it as a speculation. (shrink)

In this paper the strategy for the eliminative reduction of the alethic modalities suggested by John Venn is outlined and it is shown to anticipate certain related contemporary empiricistic and nominalistic projects. Venn attempted to reduce the alethic modalities to probabilities, and thus suggested a promising solution to the nagging issue of the inclusion of modal statements in empiricistic philosophical systems. However, despite the promise that this suggestion held for laying the ‘ghost of modality’ to rest, this general approach, tempered (...) modal eliminativism, is shown to be inadequate for that task.<br><br>. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Ideas 63.4 (2002) 639-658 [Access article in PDF] "The whole exercise of reason":Charles Mein's Account of Rationality James G. Buickerood L'Auteur de cet Ouvrage nous paroit meriter un rang distingué parmi les Auteurs Metaphysiques. Il seroit seulement à souhaiter qu'il eût traité ses matiéres avec un peu plus de Methode. Ce n'est pas qu'il ne soit très-intelligible, & que son Stile même ne soit (...) assez pur, mais un Auteur devroit se souvenir que ceux qui liront son ouvrage ne suivront pas ses pensées comme il les suit, & qu'on ne se rapellera pas ce qu'il a dit aussi facilement qu'il se le rapelle lui-même.... Il nous paroit que si l'Auteur veut encore s'exercer sur pareilles matieres il ne fera pas mal de repasser sur ce qui'il vient de publier, de donner des definitions plus intelligibles, & d'éclaircir le reste avec plus d'exactitude. — Bibliothèque raisonnée, June 1729 Two Dissertations concerning Sense, and the Imagination. With an Essay on Consciousness appeared anonymously in mid-summer 1728 over the prestigious imprint of Tonson in the Strand. 1 The "Essay on Consciousness" explicates the nature and functions of consciousness. The two dissertations modestly prepare for an inquiry into human understanding, which [End Page 639] is at present very much wanted; and towards which the removal of those Prejudices arising from Sense, and the Imagination, which hinder Men from discovering the Truth, or discerning it, tho' fairly offered to them, is the first Step to be made; and may be of some use to any one who shall hereafter undertake to explain and set forth, in a clear and perspicuous Light, the native and genuine Operations of the Understanding, as they are in Themselves, without mixing or confounding them with any Others. (1-2) A Bibliothèque raisonnée review twice noted the book's diffusion and inconvenient organization. 2 The book is nonetheless interesting for its clear defense of the cognitive superiority of reason over sense and imagination, its attack on contemporary conflations of human and brutal natures, and its treatment of consciousness, dreams, madness, and the self. In its assay of human understanding Two Dissertations implements Peripatetic, Cartesian, and even Lockean principles. The last notwithstanding, the work is an assault on the Lockean reduction of understanding to passive perception and on Locke's conception of knowledge as the perception of ideas and their relations. It is also an attempt to resuscitate reason in the teeth of nominalist accounts of rationality such as those of John Toland and allied freethinkers. 3 In pursuing these goals, it offers variations on traditional concepts of cognition, such as a conception of notions as acts of intellectual apprehension which an interpreting mind brings to bear on sensory appearances. This understanding of notions as acts falls within the British notional way marked by Digby, White, Sergeant, and especially Burthogge, antedating publication of George Berkeley's explicit distinction between passive ideas and notions owing to reflection. 4 Notions play an important role in Two Dissertations, contrasting the mind's active, rational contribution to knowledge with Lockean ideas. Yet the work's treatment of notions contains intimations of a more elaborate conception of rationality that includes a distinct order of reflective notions not deployed in this book (25-26).Clearly identifying the purposes, doctrine, and authorship of Two Dissertations is worthwhile insofar as its detailed analysis of consciousness is intrinsically interesting and quite possibly historically important, despite its neglect in the past century. For its "Essay on Consciousness" purports to be the "first Attempt that hath been made on the Subject" (sig. A3r ; cf. 141-42). While conventional [End Page 640] interpretations of modern philosophy may have habituated us to be skeptical of such a claim made as late as 1728, it is by no means outlandish, subject to textual and conceptual qualification. This paper concerns primarily just one function of the conscious mind addressed in Two Dissertations: the concept of... (shrink)

This paper focuses on one of the metaphysical problems for theistic evolution which is the problem of evolutionary transition from one specified substantial form to another. According to the evolutionary account, new substantial forms appear owing to accidental changes in previously existing substances. However, the accidental change may only lead to production of new accidents not entirely new distinct substantial forms. The solutions proposed by modern Thomists head in two directions: One is the reduction of the number of substantial forms (...) ; the other consists of diminishing substantial form altogether. Both proposals stray from classical metaphysics. The evolutionary account of the origin of species ultimately needs to challenge the real existence of species and leads to nominalism. As such it cannot be reconciled with classical metaphysics. (shrink)

Le livre III de l’Essai de Locke passe pour un des textes importants que la fin du XVIIe siècle consacre exclusivement au langage. Mais il ne faut pas s’attendre à y trouver un traité de linguistique innovant dans un champ vierge; même si Locke découvre tardivement l’importance du nom dans le savoir, il lui est facile de trouver autour de lui suffisamment de travaux pour prendre position, critiquer, simplifier, réorienter. Réorienter car son étude du nom ne vise qu’à préparer un (...) traité de la connaissance, non à faire de la linguistique pour elle-même. Il simplifie de ce fait les travaux que le Scolastique nominaliste notamment avait multipliés. Il critique tous ceux qui dissocient le mot de la double “référence” qui lui est “naturelle” : l’idée et la chose; contre Hobbes mais aussi contre les théoriciens des langues universelles, il ancre les langues dans l’usage commun d’une part, dans le rapport incertain aux choses d’autre part, toujours par la médiation de la pensée individuelle. Il prend enfin position : le nom est l’instrument privilégié de l’abstraction et de la généralisation : indispensable pour la communication et l’accumulation du savoir, il est aussi le lieu de toutes les illusions. Par son approche des espèces naturelles, par sa critique de l’essentialisme qui restaure paradoxalement l’abstrait et l’universel, par sa réduction du langage à la communication d’informations, plus que par sa théorie linguistique, ce texte nous donne encore à penser. (shrink)

Cet ouvrage confronte la conception des principes constitutifs de la réalité chez Thomas d'Aquin, Scot, Occam et quelques conséquences produites par ces principes. Il met ainsi en lumière trois modèles de philosophie pertinents pour éclairer la pensée contemporaine : une philosophie transcendantale, une pensée nominaliste empiriste et une pensée de l'acte d'être de l'être en acte. Aux yeux de l'auteur, cette dernière possède, grâce à l'ordre hiérarchique, à la causalité et à l'analogie, la vertu d'échapper aux contradictions et aux réductions (...) qui menacent les deux premières. Un tel débat montre l'intérêt permanent d'une ontologie de l'acte. (shrink)

This work is the first English translation of Scotus's commentary on Aristotle's Quaestiones super Praedicamenta. Although there are numerous Latin commentaries on Aristotle's Categories, Scotus's Questions is one of the few commentaries on the Categories written in the thirteenth century covering all of Aristotle's text, including the often neglected post-praedicamenta, and the only complete Latin commentary available in English. Moreover, unlike many of the commentaries, Scotus's text is one of the last commentaries to be written before the nominalist reduction of (...) the categories to substance and quality. The question format allows Scotus a great deal of liberty to discuss the categories in detail, as well as matters that are only remotely raised by the text. Altogether, the forty-four questions cover the following subjects: questions 1-4 are prolegomena to the work itself and raise the question of its subject matter as well as whether there can be a science of the categories; questions 5-8 deal with equivocals, univocals, and denominatives; questions 9-11 discuss Aristotle's two rules regarding predication and the sufficiency of the categories; questions 12-36 discuss the four main categories treated by Aristotle, namely, substance, quantity, relation, and quality; and the remaining eight questions discuss the post-praedicamenta. (shrink)

In terms of subject-centered philosophy of existential realism, the article discusses the ontological theories of George Berkeley and Bruno Latour, outlining and clarifying the conceptual relationship between the two. This relationship manifests itself: (a) in the attention that both paid to the issue of discreteness/continuity of matter and the limitations of its divisibility, (b) in their shared inclination toward nominalism and methodological affinity for the complementarity principle, (c) in an increased attention to weaker bonds of a correlation (coordination) type (...) rather than to strong bonds of determination type, (d) in linking the above orientations to the discussion of the ontological status of the subject, who first of all is human. G. Berkeley raises human subjectivity to a level that is as high as possible within the framework of religious idealistic philosophy. Such a position is achieved through several steps: through a postulate-based prohibition of infinite divisibility of matter and tabooing reduction of the macro-world to elements of the micro-world; through a sharp delimitation of the subject from everything the subject is not; through the hypothetical assumption of solipsism, which, in fact, always remains relative; through combining solipsistic nominalism and theistic realism based on the complementarity principle. However, B. Latour minimizes man’s personal agency. This paradigm is associated with a number of others: with the assumption of the infinite divisibility of matter, at least with reducing three dimensions to one, and macro-level to micro-level; with equalizing the subject and the non-subject, humans and non-humans; with his caution to an individual as an opponent of democracy; with combining scientist nominalism and technologism of the actant-rhizome network based on the complementarity principle. Latour’s claims to non-trivial materialism and realism, if he has them, are inconsistent. An existential realist is likely to define his ontology as technologically desubjectified Berkeleianism. (shrink)

In Logical Forms II Chateaubriand puts the simple question: Why should we accept Ockham’s razor? He blames the principle of reduction as an unjustified dogma of nominalism. In this paper I present a justification for it. Contrary to Russell`s conception of reduction as elimination, I propose the thesis that reduction is explanation.Em Logical Forms II, Chateaubriand levanta a questão: Por que deveríamos aceitar a navalha de Ockham? Ele critica esse princípio de redução como um dogma não justificado do nominalismo. (...) Neste artigo apresento uma justificativa para o princípio. Ao contrário da concepção de Russell de redução como eliminação, eu proponho a tese de que redução é explanação. (shrink)

Este trabajo considera el programa de reducción de universales por clases de tropos semejantes. Diversas cuestiones surgen acerca de la relación de semejanza: ¿Presuponen los "respectos" de semejanza un universal? ¿Induce un regres vicioso el hecho de que la relación de semejanza sea una relación? Si hay diferentes respectos de comparación entre tropos, entonces hay espacio para las dificultades tradicionales contra el nominalismo de semejanza: la "comunidad imperfecta" y la "compañía". ¿Pueden ser manejados estos problemas con clases de tropos semejantes? (...) La relación de semejanza requerida es una "semejanza perfecta", esto es, una relación de semejanza transitiva, sin margen para grados y sin variación en los respectos de comparación entre tropos. ¿Hay clases de tropos exactamente semejantes? Después de consideradas estas cuestiones, parece que el defensor de los tropos tiene respuestas para las cuestiones, y, pero parece no haber respuestas plausibles para la cuestión. Las clases de semejanza perfecta que van a reemplazar a los universales deben ser clases de tropos posibles y no hay formas razonables de explicar los hechos modales requeridos para estos tropos.This work considers the program of reduction of universals by classes of resembling tropes. Several questions appear concerning the relation of resemblance: Does not the "respects" for resemblance presuppose a universal? Does not the fact that the relation of resemblance is a relation induce a vicious regress? If there are different respects of comparison between tropes, then there is space for the traditional difficulties against resemblance nominalism: the "imperfect community" and the "companionship" difficulties. Can these problems be handled by classes of tropes? The relation of resemblance required is "perfect resemblance", that is, a relation of resemblance transitive, with no margin for degrees, and with no variation in the respects of comparison between tropes. Are there any perfect resembling tropes? After consideration, it appears that the defender of tropes seems to have answers for the questions, and, but it seems that there are no plausible answers for the question. The classes of exact resemblance that are going to replace the universals should be classes of possible tropes and there are no reasonable ways of explaining the modal facts required for these tropes. (shrink)

The Aristotelian double characterization of a primary substanceexploits the difference between the part-whole relation and the non-linguisticrelation of predication. A problem arises whether and how the second relationcould be reduced to something else. Such a reduction is explicitly declared orat least implicitly assumed in all version of conceptualism and nominalism.The moderate realism is often interpreted as a reductionism of this kindbut such interpretations do not seem corect. Only the so called resemblancetheory can be regarded as a successful attempt at (...) the reduction in question.However, it seems that the predication per se cannot be disposed of even inthis way. If so, then the nature of the relation of predication still waits fora precise analysia and description. This would provide an insight into theessence of a universal being. (shrink)

A fresh, constructive inquiry into the metaphysics of knowledge and the principles of order by which the various disciplines are related and integrated. As the basis of this inquiry, the author provides a defense of metaphysical realism and intentional logic, in opposition to the reductive tendencies which he finds exemplified in naturalism, idealism, nominalism, and the "postulational" ontologies of such thinkers as Whitehead. The aim of the work is a natural classification of knowledge, based on kinds of evidence (...) and subject matter, and on an understanding of the manner in which each discipline presupposes the others.--J. F. D. (shrink)

A painstakingly-argued, well-documented, scholarly work arguing for a sophisticated representative realism. Heuristically the analysis centers principally around Brentano, Meinong, Frege, and Bergmann. Some distinctive theses are mind is not substantial but a pluralism of momentary mental acts in which a subsequent act may have a predecessor for its object; things are really states of affairs; bare particulars are individuating principles; every mental act is propositional—its content does not intend a particular; possible states of affairs, which are nothing but could be, (...) can be intended ; thought-world, language-world correspondences do not coincide ; and a behavioristic reduction of intentional contexts would not account for "how certain mental phenomena give rise to the occurrence of intentional contexts". The organizational theme is the idealist-realist controversy in perception, with the nominalist-realist controversy covered by excellent discussions of universals and relations.—P. S. (shrink)

Richard Tieszen's new book1 is a collection of fifteen articles and reviews, spanning fifteen years, presenting the author's approach to philosophical questions about logic and mathematics from the point of view of phenomenology, as developed by Edmund Husserl in the later phase2 of his philosophical thinking known as transcendental phenomenology, starting in 1907 with the Logical Investigations and characterized by the introduction of the notions of ‘reduction’. Husserlian transcendental phenomenology as philosophy of mathematics is described as one that ‘cuts across’ (...) different philosophical positions, such as platonism, nominalism, fictionalism, Hilbertian formalism, etc. but, at the same time, as having built in the conceptual tools which allow one not to incur the kinds of problems which are usually related to one's preferred approach. Phenomenology centers around the notion of intentionality3 or aboutness, i.e. the characteristic of acts of cognition of being about something. The ‘something’ a cognitive act is about is called its ‘intentional object’, meaning the object of an intentional act. Any kind of object can be seen as an intentional object irrespective of whether it is concrete, illusory, abstract, etc. Indeed the emphasis is on the intentional act, as it is in the intentional act that the object—which need not be claimed to exist—is present. In order to achieve knowledge of an object the phenomenologist investigates the consciousness of the knowing subject when performing the act directed to that particular object.Characterized in this way, it is not difficult to see that phenomenology has a straightforward bearing on almost everything, philosophy of mathematics included. As Tieszen puts it , ‘[…] our mathematical beliefs are always about something. They are about certain objects, such as numbers, sets, functions or groups […]’. …. (shrink)

…entities? 2. How to be a nominalist 2.1. “Speak with the vulgar …” 2.2. “…think with the learned” 3. Arguments for nominalism 3.1. Intelligibility, physicalism, and economy 3.2. Causal..

…entities? 2. How to be a nominalist 2.1. “Speak with the vulgar …” 2.2. “…think with the learned” 3. Arguments for nominalism 3.1. Intelligibility, physicalism, and economy 3.2. Causal..

Gardeners, poets, lovers, and philosophers are all interested in the redness of roses; but only philosophers wonder how it is that two different roses can share the same property. Are red things red because they resemble each other? Or do they resemble each other because they are red? Since the 1970s philosophers have tended to favour the latter view, and held that a satisfactory account of properties must involve the postulation of either universals or tropes. But Gonzalo Rodriguez-Pereyra revives the (...) dormant alternative theory of resemblance nominalism, showing first that it can withstand the attacks of such eminent opponents as Goodman and Armstrong, and then that there are reasons to prefer it to its rival theories. The clarity and rigour of his arguments will challenge metaphysicians to rethink their views on properties. (shrink)

Gonzalo Rodriguez-Pereyra offers a fresh philosophical account of properties. How is it that two different things (such as two red roses) can share the same property (redness)? According to resemblance nominalism, things have their properties in virtue of resembling other things. This unfashionable view is championed with clarity and rigor.

In "nominalism and realism" armstrong carefully demolishes various nominalist responses to plato's "one over many" problem but simply dismissed the quinean response as "ostrich nominalism". The paper argues that plato's problem is pseudo. So to ignore it is not to behave like an ostrich. Rather to adopt realism because of this problem that isn't there is to be a "mirage realist." there are some good reasons that lead armstrong to realism but he is largely a mirage realist. Quine (...) does not ignore any real problem for nominalism and so is not an ostrich nominalist. (shrink)

The subject matter of this thesis is analytic ontology. Chapters II and III deal with two versions of trope theory, or moderate nominalism; these are defined as ontologies which recognise properties and relations but no (real) universals. The key notion of both theories, trope, is characterised as an abstract particular. What the abstractness amounts to differs between the two. Yet another difference is that simplicity is an essential trait of a trope according to one theory, but not according to (...) the other. Though exact similarity is said to play an important role in both theories, as it turns out, this does not seem to be the case. The ontology dealt with in chapter IV is a mixture of moderate nominalism concerning qualities and realism concerning relations. In it, quality instances (moments) and universal relations are the ultimate constituents of the universe. While relations and moments are considered to be constituents of states of affairs, which are characterised as objects of higher orders, complexes that are objects of the first order are made up of moments on their own. Among these complexes one finds the ordinary objects. Paradoxically, although relations are necessary for the existence of complex first order objects, relations are not thought to be among the contents of these objects. The main subject of chapter V is a particular version of moderate realism; it is an ontology which is realistic in its recognition of universals and moderate in its recognition of instances of these universals. Instances combine to form complex networks. A theoretically motivated claim is that although each instance has a predicational aspect as well as a universal one, it is simple in the sense of lacking internal predicative structure; though, this claim can be called into question. Keywords: analytic ontology, moderate nominalism, moderate realism, particular, universal, abstract, concrete, abstract particular, abstract universal, concrete particular, concrete universal, trope, moment, complex unity, collection, instance, unit attribute, intensional aspect, predicational aspect, continuous composite, articulated composite. (shrink)

Logic begins but does not end with the study of truth and falsity. Within truth there are the modes of truth, ways of being true: necessary truth and contingent truth. When a proposition is true, we may ask whether it could have been false. If so, then it is contingently true. If not, then it is necessarily true; it must be true; it could not have been false. Falsity has modes as well: a false proposition that could not have been (...) true is impossible or necessarily false; one that could have been true is merely contingently false. The proposition that some humans are over seven feet tall is contingently true; the proposition that all humans over seven feet tall are over six feet tall is necessarily true; the proposition that some humans are over seven feet tall and under six feet tall is impossible, and the proposition that some humans are over nine feet tall is contingently false. Of these four modes of truth, let us focus on necessity, plus a fifth: possibility. A proposition is possible if it is or could have been true; hence propositions that are either necessarily true, contingently true, or contingently false are possible. Notions that are similar to the modes of truth in being concerned with what might have been are called modal. Dispositions are modal notions, for example the disposition of fragility. Relatedly, there are counterfactual conditionals, for example “if this glass were dropped, it would break.” And the notion of supervenience is modal.1 But let us focus here on necessity and possibility. Modal words are notoriously ambiguous (or at least context-sensitive2). I may reply to an invitation to give a talk in England by saying “I can’t come; I have to give a talk in California the day before”. This use of “can’t” is perfectly appropriate. But it would be equally appropriate for me to say that I could cancel my talk in California (although that would be rude) and give the talk in England instead. What I cannot do is give both talks.. (shrink)

1. 1. PROGRAM It will be our aim to reconstruct, with precision, certain views which have been traditionally associated with nominalism and to investigate problems arising from these views in the construction of interpreted formal systems. Several such systems are developed in accordance with the demand that the sentences of a system which is acceptable to a nominalist must not imply the existence of any entities other than individuals. Emphasis will be placed on the constructionist method of philosophical analysis. (...) To follow this method is to introduce the central notions of the subject-matter to be investigated into a system governed by exact rules. For example, the constructionist method of investigating the properties of geometric figures may consist in formulating a system of postulates and definitions which, together with the apparatus of formal logic, generates all necessary truths concerning geometric figures. Similarly, a constructionist analysis of the notion of an individual may take the form of an axiomatic theory whose provable assertions are just those which seem essential to the role played by the concept of an individual in system atic contexts. Such axiomatic theories gain in interest if they are supple mented by precise semantical rules specifying the denotation of all terms and the truth conditions of all sentences of the theory. (shrink)

ABSTRACT: Sellars formulated his thesis of 'psychological nominalism' in two very different ways: (1) most famously as the thesis that 'all awareness of sorts…is a linguistic affair', but also (2) as a certain thesis about the 'psychology of the higher processes'. The latter thesis denies the standard view that relations to abstract entities are required in order to explain human thought and intentionality, and asserts to the contrary that all such mental phenomena can in principle ‘be accounted for causally' (...) without any use of normative terms in the explanation. Recent 'Hegelian Sellarsians' such as Rorty, McDowell, and Brandom have argued that the holistic, normative themes in (1) support various non-realist or rather (German) 'idealist but common-sense realist' outlooks. By contrast, Sellars' own defenses of (2) reveal psychological nominalism itself to be a naturalistic empiricism intended to sustain the normative-holistic themes in (1) within an exhaustively scientific naturalist conception of reality. (shrink)

It is widely assumed that platonism with respect to a discourse of metaphysical interest, such as fictional or mathematical discourse, affords a better account of the semantic appearances than nominalism, other things being equal. Of course, other things may not be equal. For example, platonism is supposed to come at the cost of a plausible epistemology and ontology. But the hedged claim is often treated as a background assumption. It is motivated by the intuitively stronger one that the platonist (...) can take the semantic appearances at ‘face-value’ while the nominalist must resort to ad hoc and technically problematic machinery in order to explain those appearances away. In this article, I argue that, on any natural construal of ‘face-value’, the platonist, like the nominalist, is not able to take the semantic appearances at face-value. And insofar as the nominalist is forced to resort to ad hoc and technically awkward devices in order to explain those appearances away, the platonist must resort to such devices as well. One moral of the story is that the thesis that platonism affords a better account of the semantic appearances than nominalism – even other things being equal – is not trivial. Another is that we should rethink a widespread methodology in metaphysics. (shrink)