Introduction: Reductionists are those who take one theory or phenomenon to be reducible to some other theory or phenomenon. For example, a reductionist regarding mathematics might take any given mathematical theory to be reducible to logic or set theory. Or, a reductionist about biological entities like cells might take such entities to be reducible to collections of physico-chemical entities like atoms and molecules. The type of reductionism that is currently of most interest in metaphysics and philosophy of mind involves the claim that all sciences are reducible to physics. This is usually taken to entail that all phenomena (including mental phenomena like consciousness) are identical to physical phenomena. The bulk of this article will discuss this latter understanding of reductionism.
Imagery and imagination
Abstract: Both imagery and imagination play an important part in our mental lives. This article, which has three main sections, discusses both of these phenomena, and the connection between them. The first part discusses mental images and, in particular, the dispute about their representational nature that has become known as the ‘imagery debate’. The second part turns to the faculty of the imagination, discussing the long philosophical tradition linking mental imagery and the imagination – a tradition that came under attack in the early part of the twentieth century with the rise of behaviorism. Finally, the third part of this article examines modal epistemology, where the imagination has been thought to serve an important philosophical function, namely, as a guide to possibility.
Metaphysics
Introduction: It is not easy to say what metaphysics is. Ancient and Medieval philosophers might have said that metaphysics was, like chemistry or astrology, to be defined by its subject matter: metaphysics was the ‘science’ that studied ‘being as such’ or ‘the first causes of things’ or ‘things that do not change’. It is no longer possible to define metaphysics that way. First, a philosopher who denied the existence of those things that had once been seen as constituting the subject-matter of metaphysics – first causes or unchanging things – would now be considered to be making thereby a metaphysical assertion. Second, there are many philosophical problems that are now considered to be metaphysical problems (or at least partly metaphysical problems) that are in no way related to first causes or unchanging things – the problem of free will, for example, or the problem of the mental and the physical.
The first three sections of this entry examine a broad selection of problems considered to be metaphysical and discuss ways in which the purview of metaphysics has expanded over time. The central problems of metaphysics were significantly more unified in the Ancient and Medieval eras. Which raises a question – is there any common feature that unites the problems of contemporary metaphysics? The final two sections of the entry discuss some recent theories of the nature and methodology of metaphysics, including those that consider metaphysics as an impossible enterprise.
Logical Pluralism
Description: Survey article on logical pluralism. The article is divided into three main parts: i) in the first one the author presents the main arguments for logical pluralism with respect to logical consequence; ii) in the second part, the author considers the relation between logical pluralism and Carnap’s linguistic pluralism; iii) in the last section, the author considers further kinds of logical pluralism.
Virtue Ethics
Introduction: Virtue ethics is a broad term for theories that emphasize the role of character and virtue in moral philosophy rather than either doing one’s duty or acting in order to bring about good consequences. A virtue ethicist is likely to give you this kind of moral advice: “Act as a virtuous person would act in your situation.” Most virtue ethics theories take their inspiration from Aristotle who declared that a virtuous person is someone who has ideal character traits. These traits derive from natural internal tendencies, but need to be nurtured; however, once established, they will become stable. For example, a virtuous person is someone who is kind across many situations over a lifetime because that is her character and not because she wants to maximize utility or gain favors or simply do her duty. Unlike deontological and consequentialist theories, theories of virtue ethics do not aim primarily to identify universal principles that can be applied in any moral situation. And virtue ethics theories deal with wider questions—“How should I live?” and “What is the good life?” and “What are proper family and social values?”
Feminist Epistemology and Philosophy of Science
Abstract: Feminist epistemology and philosophy of science studies the ways in which gender does and ought to influence our conceptions of knowledge, the knowing subject, and practices of inquiry and justification. It identifies ways in which dominant conceptions and practices of knowledge attribution, acquisition, and justification systematically disadvantage women and other subordinated groups, and strives to reform these conceptions and practices so that they serve the interests of these groups. Various practitioners of feminist epistemology and philosophy of science argue that dominant knowledge practices disadvantage women by (1) excluding them from inquiry, (2) denying them epistemic authority, (3) denigrating their ‘feminine’ cognitive styles and modes of knowledge, (4) producing theories of women that represent them as inferior, deviant, or significant only in the ways they serve male interests, (5) producing theories of social phenomena that render women’s activities and interests, or gendered power relations, invisible, and (6) producing knowledge (science and technology) that is not useful for people in subordinate positions, or that reinforces gender and other social hierarchies. Feminist epistemologists trace these failures to flawed conceptions of knowledge, knowers, objectivity, and scientific methodology. They offer diverse accounts of how to overcome these failures. They also aim to (1) explain why the entry of women and feminist scholars into different academic disciplines, especially in biology and the social sciences, has generated new questions, theories, and methods, (2) show how gender and feminist values and perspectives have played a causal role in these transformations, (3) promote theories that aid egalitarian and liberation movements, and (4) defend these developments as cognitive, not just social, advances.
Quantum Mechanics
Introduction: Quantum mechanics is, at least at first glance and at least in part, a mathematical machine for predicting the behaviors of microscopic particles – or, at least, of the measuring instruments we use to explore those behaviors – and in that capacity, it is spectacularly successful: in terms of power and precision, head and shoulders above any theory we have ever had. Mathematically, the theory is well understood; we know what its parts are, how they are put together, and why, in the mechanical sense (i.e., in a sense that can be answered by describing the internal grinding of gear against gear), the whole thing performs the way it does, how the information that gets fed in at one end is converted into what comes out the other. The question of what kind of a world it describes, however, is controversial; there is very little agreement, among physicists and among philosophers, about what the world is like according to quantum mechanics. Minimally interpreted, the theory describes a set of facts about the way the microscopic world impinges on the macroscopic one, how it affects our measuring instruments, described in everyday language or the language of classical mechanics. Disagreement centers on the question of what a microscopic world, which affects our apparatuses in the prescribed manner, is, or even could be, like intrinsically; or how those apparatuses could themselves be built out of microscopic parts of the sort the theory describes.
Symmetry and Symmetry Breaking
Introduction: Symmetry considerations dominate modern fundamental physics, both in quantum theory and in relativity. Philosophers are now beginning to devote increasing attention to such issues as the significance of gauge symmetry, quantum particle identity in the light of permutation symmetry, how to make sense of parity violation, the role of symmetry breaking, the empirical status of symmetry principles, and so forth. These issues relate directly to traditional problems in the philosophy of science, including the status of the laws of nature, the relationships between mathematics, physical theory, and the world, and the extent to which mathematics suggests new physics.
This entry begins with a brief description of the historical roots and emergence of the concept of symmetry that is at work in modern science. It then turns to the application of this concept to physics, distinguishing between two different uses of symmetry: symmetry principles versus symmetry arguments. It mentions the different varieties of physical symmetries, outlining the ways in which they were introduced into physics. Then, stepping back from the details of the various symmetries, it makes some remarks of a general nature concerning the status and significance of symmetries in physics.
The Social dimensions of scientific knowledge
Summary: Attention to the social dimensions of scientific knowledge is a relatively recent focus of philosophers of science. While some earlier philosophers made contributions to the topic that are still of relevance today, modern interest was stimulated by historians and sociologists of science such as Thomas Kuhn and the growing role played by the sciences in society and, by extension, in the lives of its citizens. There are two main vectors of interest: internal relations within scientific communities, and relations between science and society. This article covers literature in both categories. It starts with work that functions as historical backdrop to current work. As a subfield within philosophy of science, this area is too recent to have dedicated journals and has only a few anthologies. Nevertheless, there are resources in both categories. The remainder of the article lists work in specific subareas.
Dispositions
Summary: This is a perfect overview article that serves as a general introduction to the topic of dispositions. It is composed of six sections that review the main philosophical approaches to the most important questions: Analysis of disposition ascription, the dispositional/categorical distinction, dispositions and categorical bases, the intrinsicness of dispositions and the causal efficacy of dispositions.