A new approach to the metaphysics, background logic, and semantics of ontological debate, Ontology Without Borders offers new solutions to perennial philosophical puzzles about constitution and the nonexistent. Book jacket.

Our experience of objects (and consequently our theorizing about them) is very rich. We perceive objects as possessing individuation conditions. They appear to have boundaries in space and time, for example, and they appear to move independently of a background of other objects or a landscape. In Ontology Without Boundaries Jody Azzouni undertakes an analysis of our concept of object, and shows what about that notion is truly due to the world and what about it is a projection onto the world of our senses and thinking. Location and individuation conditions are our product: there is no echo of them in the world. Features, the ways that objects seem to be, aren't projections. Azzouni shows how the resulting austere metaphysics tames a host of ancient philosophical problems about constitution ("Ship of Theseus," "Sorities"), as well as contemporary puzzles about reductionism. In addition, it's shown that the same sorts of individuation conditions for properties, which philosophers use to distinguish between various kinds of odd abstracta-universals, tropes, and so on, are also projections. Accompanying our notion of an object is a background logic that makes cogent ontological debate about anything from Platonic objects to Bigfoot. Contemporary views about this background logic ("quantifier variance") make ontological debate incoherent. Azzouni shows how a neutral interpretation of quantifiers and quantifier domains makes sense of both philosophical and pre-philosophical ontological debates. Azzouni also shows how the same apparatus makes sense of our speaking about a host of items--Mickey Mouse, unicorns, Martians--that nearly all of us deny exist. It's allowed by what Azzouni shows about the background logic of our ontological debates, as well as the semantics of the language of those debates that we can disagree over the existence of things, like unicorns, without that background logic and semantics forcing ontological commitments onto speakers that they don't have.

Both science and philosophy are interested in questions of ontology - questions about what exists and what these things are like. Science and philosophy, however, seem like very different ways of investigating the world, so how should one proceed? Some defer to the sciences, conceived as something apart from philosophy, and others to metaphysics, conceived as something apart from science, for certain kinds of answers. This book contends that these sorts of deference are misconceived. A compelling account of ontology must appreciate the ways in which the sciences incorporate metaphysical assumptions and arguments. At the same time, it must pay careful attention to how observation, experience, and the empirical dimensions of science are related to what may be viewed as defensible philosophical theorizing about ontology. The promise of an effectively naturalized metaphysics is to encourage beliefs that are formed in ways that do justice to scientific theorizing, modeling, and experimentation. But even armed with such a view, there is no one, uniquely rational way to draw lines between domains of ontology that are suitable for belief, and ones in which it would be better to suspend belief instead. In crucial respects, ontology is in the eye of the beholder: it is informed by underlying commitments with implications for the limits of inquiry, which inevitably vary across rational inquirers. As result, the proper scope of ontology is subject to a striking form of voluntary choice, yielding a new and transformative conception of scientific ontology.

Metaphysicians should pay attention to quantum mechanics. Why? Not because it provides definitive answers to many metaphysical questions-the theory itself is remarkably silent on the nature of the physical world, and the various interpretations of the theory on offer present conflicting ontological pictures. Rather, quantum mechanics is essential to the metaphysician because it reshapes standard metaphysical debates and opens up unforeseen new metaphysical possibilities. Even if quantum mechanics provides few clear answers, there are good reasons to think that any adequate understanding of the quantum world will result in a radical reshaping of our classical world-view in some way or other. Whatever the world is like at the atomic scale, it is almost certainly not the swarm of particles pushed around by forces that is often presupposed. This book guides readers through the theory of quantum mechanics and its implications for metaphysics in a clear and accessible way. The theory and its various interpretations are presented with a minimum of technicality. The consequences of these interpretations for metaphysical debates concerning realism, indeterminacy, causation, determinism, holism, and individuality (among other topics) are explored in detail, stressing the novel form that the debates take given the empirical facts in the quantum domain. While quantum mechanics may not deliver unconditional pronouncements on these issues, the range of possibilities consistent with our knowledge of the empirical world is relatively small-and each possibility is metaphysically revisionary in some way. This book will appeal to researchers, students, and anybody else interested in how science informs our world-view.

In this engaging and wide-ranging new book, Nikk Effingham provides an introduction to contemporary ontology - the study of what exists - and its importance for philosophy today. He covers the key topics in the field, from the ontology of holes, numbers and possible worlds, to space, time and the ontology of material objects - for instance, whether there are composite objects such as tables, chairs or even you and me. While starting from the basics, every chapter is up-to-date with the most recent developments in the field, introducing both longstanding theories and cutting-edge advances. As well as discussing the latest issues in ontology, Effingham also helpfully deals in-depth with different methodological principles (including theory choice, Quinean ontological commitment and Meinongianism) and introduces them alongside an example ontological theory that puts them into practice. This accessible and comprehensive introduction will be essential reading for upper-level undergraduate and post-graduate students, as well as any reader interested in the present state of the subject.

This work is ''a systematic ontology.'' Ontology is the study of being as such, and a systematic ontology is an account of the most fundamental ways of being something or other - of what they are and of how they are related to each other. The questions it pursues are not primarily about what causes things, but about what things are or consist in - though causal questions cannot be totally avoided. The title of the work, What Is, and What Is in Itself, marks the most important distinction in ways of being. What is includes everything there is, but not everything there is included in what is in itself. The first five chapters of the book define and examine the ways of being: in chapters 1 and 2, being actual or existing, or even just being something without existing or being actual; in chapter 3, being an intentional object, and perhaps a merely intentional object; in chapter 4, relations between things and their properties; and in chapter 5, being a thing in itself. Chapter 6 discusses whether only conscious beings are things in themselves, and suggests an affirmative answer. Chapter 7 discusses the epistemology of ontology. Chapters 8 and 9 discuss issues about thisness and identity. And chapters 10 and 11 discuss mainly occasionalist and panentheist answers to questions about the causal unity of the universe.

A remarkably clear explication of the tenets of Object-Oriented Philosophy and an acute critique of the movement's ramifications for philosophy today. How does the patience and rigour of philosophical explanation fare when confronted with an irrepressible desire to commune with the object and to escape the subjective perplexities of reference, meaning, and sense? Moving beyond the hype and the inflated claims made for “Object-Oriented” thought, Peter Wolfendale considers its emergence in the light of the intertwined legacies of twentieth-century analytic and Continental traditions. Both a remarkably clear explication of the tenets of OOP and an acute critique of the movement's ramifications for philosophy today, Object-Oriented Philosophy is a major engagement with one of the most prevalent trends in recent philosophy.