I develop a non-representationalist account of mathematical thought, on which the point of mathematical theorizing is to provide us with the conceptual capacity to structure and articulate information about the physical world in an epistemically useful way. On my view, accepting a mathematical theory is not a matter of having a belief about some subject matter; it is rather a matter of structuring logical space, in a sense to be made precise. This provides an elegant account of the cognitive utility (...) of mathematics. Further, it makes explicit how the brand of non-representationalism I develop is compatible with there being substantive rationality constraints on our mathematical theorizing. (shrink)

The role of possible worlds in philosophy is hard to overestimate. Nevertheless, their nature and existence is very controversial. This is particularly serious, since their standard applications depend on there being sufficiently many of them. The paper develops an account of possible worlds on which it is particularly easy to believe in their existence: an account of possible worlds as pleonastic entities. Pleonastic entities are entities whose existence can be validly inferred from statements that neither refer to nor quantify over (...) them as a matter of conceptual necessity. Definitions are proposed that ensure that this is the case for possible worlds. (shrink)

Two major questions have dominated work on the metaphysics of social groups: first, Are there any? And second, What are they? I will begin by arguing that the answer to the ontological question is an easy and obvious ‘yes’. We do better to turn our efforts elsewhere, addressing the question: “What are social groups?” One might worry, however, about this question on grounds that the general term ‘social group’ seems like a term of art—not a well-used concept we can analyze, (...) or can presuppose corresponds to a real kind we can investigate. But while the general notion of ‘social group’ may be a term of art, our terms for clubs and courts, races and genders, are not. It is worth stepping back to ask what function these social group concepts serve. I will argue that individual social group concepts function to give normative structure to our lives together. Paying attention to the role of norms in social groups, I will argue, can enable us to provide a unified understanding of the importance of core social groups, while still respecting the great differences among social groups of different kinds. (shrink)

This paper examines what’s at stake in which form of metaontological deflationism we adopt. Stephen Yablo has argued for a ‘quizzicalist’ approach, holding that many ontological questions are ‘moot’ in the sense that there is simply nothing to settle them. Defenders of the ‘easy approach’ to ontology, by contrast, think not that these questions are unsettled, but that they are very easily settled by trivial inferences from uncontroversial premises—so obviously and easily settled that there is no point debating them. The (...) views may differ in terms of how far the deflation extends—while easy ontology deflates debates about ordinary objects, Yablo doesn’t think his view does. But the crucial underlying difference lies in whether we think there are ontological presuppositions for introducing terminology. (shrink)

In recent analytic metaphysics, the view that ‘ordinary inanimate objects such as sticks and stones, tables and chairs, simply do not exist’ has been defended by some noteworthy writers. Thomasson opposes such revisionary ontology in favour of an ontology that is conservative with respect to common sense. The book is written in a straightforward, methodical and down-to-earth style. It is also relatively non-specialized, enabling the author and her readers to approach problems that are often dealt with in isolation in a (...) more unified way.Thomasson's arguments are mainly counter-attacks on six ‘eliminativist’ arguments against ordinary objects. A causal redundancy argument espoused by Trenton Merricks holds that to suppose that there are ordinary objects is to suppose that these objects have distinctive causal powers. However, the casual efficacy of a baseball, for example, is exhausted by that of some suitably arranged …. (shrink)

The existence of a social world raises both the metaphysical puzzle: how can there be a “reality” of facts and objects that are genuinely created by human intentionality? and the epistemological puzzle: how can such a product of human intentionality include objective facts available for investigation and discovery by the social sciences? I argue that Searle’s story about the creation of social facts in The Construction of Social Reality is too narrow to fully solve either side of the puzzle. By (...) acknowledging different forms of rules for constructing social reality paralleling rules for creating ‘make-believe’ truths, we can build a more comprehensive social ontology and allow for a more appropriate range of discovery for the social sciences. Nonetheless, I argue that despite the parallels between methods for constructing make-believe and social facts, it would be mistaken to treat talk about social reality as involving a mere pretense to refer. (shrink)

Many otherwise reasonable philosophers are impatient with ontology. These philosophers will probably have little time for Objects and Persons, which claims that while there do exist “atoms arranged statuewise”, there do not exist statues; while there do exist atoms arranged tablewise and atoms arranged chairwise, there exist no tables and chairs. Though I join these philosophers, at the end of the day, in rejecting Merricks’s claims, that day is long, whereas they want a quick verdict. But why? Do our impatient (...) friends think that Merricks’s claims are contradictory, analytically false, or otherwise conceptually incoherent? They may say that the conventional meaning of “there exists a statue” is “there exist atoms arranged statuewise”, but this does not stand up to scrutiny. Someone could, of course, just decide to mean such a thing by “there exists a statue”, but then her pronouncements would be irrelevant to Merricks, who intends to be using a.. (shrink)

Critics of contemporary metaphysics argue that it attempts to do the hard work of science from the ease of the armchair. Physics, not metaphysics, tells us about the fundamental facts of the world, and empirical psychology is best placed to reveal the content of our concepts about the world. Exploring and understanding the world through metaphysical reflection is obsolete. In this paper, I will show why this critique of metaphysics fails, arguing that metaphysical methods used to make claims about the (...) world are similar to scientific methods used to make claims about the world, but that the subjects of metaphysics are not the subjects of science. Those who argue that metaphysics uses a problematic methodology to make claims about subjects better covered by natural science get the situation exactly the wrong way around: metaphysics has a distinctive subject matter, not a distinctive methodology. The questions metaphysicians address are different from those of scientists, but the methods employed to develop and select theories are similar. In the first section of the paper, I will describe the sort of subject matter that metaphysics tends to engage with. In the second section of the paper, I will show how metaphysical theories are classes of models and discuss the roles of experience, common sense and thought experiments in the construction and evaluation of such models. Finally, in the last section I will discuss the way these methodological points help us to understand the metaphysical project. Getting the right account of the metaphysical method allows us to better understand the relationship between science and metaphysics, to explain why doing metaphysics successfully involves having a range of different theories, to understand the role of thought experiments involving fictional worlds, and to situate metaphysical realism in a scientifically realist context. (shrink)

Analytic metaphysics is in resurgence; there is renewed and vigorous interest in topics such as time, causation, persistence, parthood and possible worlds. We who share this interest often pay lip-service to the idea that metaphysics should be informed by modern science; some take this duty very seriously.2 But there is also a widespread suspicion that science cannot really contribute to metaphysics, and that scientific findings grossly underdetermine metaphysical claims. For some, this prompts the thought ‘so much the worse for metaphysics’; (...) others mutter ‘so much the worse for science’. (shrink)