Against Fundamentality‐Based Metaphysics

Metaphysical views typically draw some distinction between reality and appearance, endorsing realism about some subject matters and antirealism about others. There are different conceptions of how best to construe antirealist theories. A simple view has it that we are antirealists about a subject matter when we believe that this subject matter fails to obtain. This paper discusses an alternative view, which I will call the fundamentality‐based conception of antirealism. We are antirealists in this sense when we think that the relevant matter fails to be constitutive of fundamental reality. The following discussion will not rely on any particular understanding of fundamental reality, covering conceptions based on grounding, naturalness and truthmaking, to name three salient ones. This paper argues that there are serious issues with fundamentality‐based metaphysics. It will be argued that: (1) the fundamentality‐based approach shapes and restricts our realist and antirealist views in unsatisfying ways, (2) that it is unable to handle the conflicting facts that lie across the envisaged ‘layers’ of the metaphysically structured world, and (3) that the methodological reasons for adopting the fundamentality‐based approach fail. The paper will conclude with a diagnosis of the discussed issues, identifying a common source.     

Transfer of Warrant, Begging the Question and Semantic Externalism

Martin Davies argues that 'limitation principles' block the transfer of warrant from the premises of a certain kind of argument to its conclusion. The class of arguments in question includes Moore's argument for the existence of the external world, and a popular style of argument which starts from two premises that are warranted by first-person authority and semantic externalism respectively, ending with a conclusion that does not, allegedly, admit of a priori justification. I argue that the relevant class of arguments can be shown to be unconvincing without appealing to any limitation principles, by showing that they beg the question against sceptical opponents. Principles limiting the transfer of warrant are not required in order to rebut the claim that first-person authority and semantic externalism are incompatible.     

II—On Modelling Vagueness—and on not Modelling Incommensurability

This paper defines and analyses the concept of a 'ranking problem'. In a ranking problem, a set of objects, each of which possesses some common property P to some degree, are ranked by P-ness. I argue that every eligible answer to a ranking problem can be expressed as a complete and transitive 'is at least as P as' relation. Vagueness is expressed as a multiplicity of eligible rankings. Incommensurability, properly understood, is the absence of a common property P. Trying to analyse incommensurability in the same framework as ranking problems causes unnecessary confusion.     

Metaphysics Within Science: Against Radical Naturalism

In Every Thing Must Go James Ladyman and Don Ross argue for a radical version of naturalistic metaphysics and propose that contemporary analytic metaphysics is detached from science and should be discontinued. The present article addresses the issues of whether (i) science and metaphysics are separable, (ii) intuitions and understanding should be excluded from scientific theory, and (iii) Ontic Structural Realism satisfies the criteria of the radical version of naturalism advanced by Ladyman and Ross. The point underlying those topics is that successful scientific research presupposes metaphysics, and that basic epistemic virtues common to metaphysics and science may allow us—as opposed to what Ladyman and Ross suggest—to increase our understanding of the world and to put constraints on allowable metaphysical theories.     

Vague Singulars,Semantic Indecision,and the Metaphysics of Persons*

Composite materialism, as I will understand it, is the view that human persons are composite material objects. This paper develops and investigates an argument, The Vague Singulars Argument, for the falsity of composite materialism. We shall see that cogent or not, the Vague Singulars Argument has philosophically significant ramifications.     

Semantic Presuppositions in Political Personhood: The Case of Discourse-Theoretic Rationality and Social Externalism

Questions about the mind and those about politics have conventionally found separate treatments in the philosophical literature. This paper proposes that crucial assumptions about the nature of the human person in politics actually turn on a compatible account of mental content. The particular relation that I will focus on here would be one between a discourse-theoretic model of persons in political ontology and social externalism in philosophy of mind. For the former, I’ll concern myself largely with Philip Pettit’s presentation of it and its expression in terms of intentional systems which, I’ll argue, renders itself to a version of social externalism that emerges out of Wittgenstein’s Philosophical Investigations. An auxiliary consequence of this exercise is the diagnosis of a familiar problem that is associated with the notion of rule-following—I’ll argue that skepticism about rule-following is only tenable when one holds on to an internalist thesis about the individuation of mental content. This objection is dissolved once a theory of understanding is adopted which works with a distinctly externalist account of mental content. Finally, I will take stock of the implications of this exercise in terms of suggesting basic grounds for a philosophically interesting relationship between political ontology and philosophy of mind.

     

Privileged Self–Knowledge and Externalism: A Contextualist Approach

Many people argue that privileged self–knowledge is incompatible with semantic externalism. I develop a contextualist approach to self–knowledge, and examine what this approach should lead us to say about the apparent incompatibility. Though such contextualism compels us to re–think the notion of privilege associated with self–knowledge, it can contain the damage wreaked by the externalist doctrine.     

Externalism,Slow Switching and Privileged Self‐Knowledge1

Recent discussions of externalism about mental content have been dominated by the question whether it undermines the intuitively plausible idea that we have knowledge of the contents of our thoughts. In this article I focus on one main line of reasoning (the so‐called ‘slow switching argument’) for the thesis that externalism and self‐knowledge are incompatible. After criticizing a number of influential responses to the argument, I set out to explain why it fails. It will be claimed that the argument trades on an ambiguity, and that only by incorporating certain controversial assumptions does it stand a chance of establishing its conclusion. Finally, drawing on an analogy with Benacerraf's challenge to Platonism, I shall offer some reasons as to why the slow switching argument fails to reveal the real source of tension between externalism and privileged self‐knowledge.     

Self-knowledge, Externalism, and Skepticism: Brian P. McLaughlin

In recent years, some philosophers have claimed that we can know a priori that certain external world skeptical hypotheses are false on the basis of a priori knowledge that we are in certain kinds of mental states, and a priori knowledge that those mental states are individuated by contingent environmental factors. Appealing to a distinction between weak and strong a priority, I argue that weakly a priori arguments of this sort would beg the question of whether the skeptical hypothesis under assessment is true, and that the prospect of a sound strongly a priori argument of this sort seems dim.
'It still remains a scandal to philosophy... that the existence of things outside of us... must be accepted merely on faith, and that, if anyone thinks good to doubt their existence, we are unable to counter his doubts by any satisfactory proof.'
(Immanuel Kant, Critique of Pure Reason)     

Self-knowledge, Externalism and Scepticism: David OwensScepticisms: Descartes and Hume

Contemporary discussion of scepticism focuses on the possibility that most or all of our beliefs might be false. I argue that the hypothesis of massive falsity and the associated 'problem of the external world' are inessential to the scepticisms of Descartes and Hume. What drives Cartesian and Humean scepticism is the demand for certainty: any possibility of error, however local, must be ruled out before we can claim either justified belief or knowledge. Contemporary philosophers have ignored this form of scepticism because they doubt that the demand for certainty can be motivated. But Descartes provides a sound motivation for this demand in the Meditations.     

From Experience to Metaphysics: On Experience‐based Intuitions and their Role in Metaphysics

Metaphysical theories are often counter‐intuitive. But they also often are strongly supported and motivated by intuitions. One way or another, the link between intuitions and metaphysics is a strong and important one, and there is hardly any metaphysical discussion where intuitions do not play a crucial role. In this article, I will be interested in a particular kind of such intuitions, namely those that come, at least partly, from experience. There seems to be a route from experience to metaphysics, and this is the core of my interest here. In order to better understand such ‘arguments from experience’ and the kind of relationship there is between this type of intuitions and metaphysical theories, I shall examine four particular cases where a kind of experience‐based intuition seems to motivate or support a metaphysical theory. At the end of the day, I shall argue that this route is a treacherous one, and that in all of the four cases I shall concentrate on, phenomenological considerations are in fact orthogonal to the allegedly ‘corresponding’ metaphysical claims. An anti‐realist view of metaphysics will emerge.     

Foundations of Mathematics: Metaphysics, Epistemology, Structure

Since virtually every mathematical theory can be interpreted in set theory, the latter is a foundation for mathematics. Whether set theory, as opposed to any of its rivals, is the right foundation for mathematics depends on what a foundation is for. One purpose is philosophical, to provide the metaphysical basis for mathematics. Another is epistemic, to provide the basis of all mathematical knowledge. Another is to serve mathematics, by lending insight into the various fields. Another is to provide an arena for exploring relations and interactions between mathematical fields, their relative strengths, etc. Given the different goals, there is little point to determining a single foundation for all of mathematics.     

Later Medieval Metaphysics. Ontology,Language & Logic

WALTER BURLEIGH, Von der Reinheit der Kunst der Logik. Erster Traktat: Von den Eigenschaften der Termini. Übersetzt und mit Einfuhrung und Anmerkungen herausgegeben von Peter Kunze. Lateinisch-deutsch. (Philosophische Bibliothek, Nr. 401 .) Hamburg: Felix Meiner, 1988. xlvii + 269 pp. 64 DM.