We sketch the mechanistic approach to levels, contrast it with other senses of “level,” and explore some of its metaphysical implications. This perspective allows us to articulate what it means for things to be at different levels, to distinguish mechanistic levels from realization relations, and to describe the structure of multilevel explanations, the evidence by which they are evaluated, and the scientific unity that results from them. This approach is not intended to solve all metaphysical problems surrounding physicalism. Yet it (...) provides a framework for thinking about how the macroscopic phenomena of our world are or might be related to its most fundamental entities and activities. (shrink)

In a recent article, Fabrice Correia explores the project of reducing the notion of grounding to that of essence. He then goes on to provide several candidate definitions and test each of them against a number of objections. His final take on the situation is, roughly, that two of the definitions can handle all of the considered objections. The aim of this paper is to re-evaluate Correia's conclusions in the light of two sources of insights: Firstly, I will argue that (...) one of the objections treated by Correia has been somewhat underestimated, and that it still constitutes a threat against definitions of grounding in terms of essence. Secondly, there are at least two further objections that should be considered by the advocate of such definitions. As I will show, one of them can be neutralized; but the other one is more serious and suggests a clear dialectical edge to an operationalist definition. (shrink)

Sabina Alkire shows how Nobel Prize-winning economist Amartya Sen's capability approach can be coherently---and practically---put to work in poverty reduction activities so that the voices and values of the poor matter. This provides economists, philosophers, theologians, and development practitioners with a way forward that addresses both theoretical and practical challenges.

Watson and Crick’s discovery of the structure of DNA led to developments that transformed many biological sciences. But what were the relevant developments and how did they transform biology? Much of the philosophical discussion concerning this question can be organized around two opposing views: theoretical reductionism and layer-cake antireductionism. Theoretical reductionist and their anti-reductionist foes hold two assumptions in common. First, both hold that biological knowledge is structured like a layer cake, with some biological sciences, such as molecular biology cast (...) at lower levels of organization, and others, such as classical genetics, cast at higher levels. Second, both assume that scientific knowledge is structured by theory and that the productivity of scientific research depends on whether the underlying theory identifies the fundamentals upon which the phenomena to be explained and investigated depend. In the first part of this paper, I challenge these assumptions. In the second part, I show how recasting the basic theory of classical genetics made it possible to retool the methodologies of genetics. It was the investigative power of these retooled methodologies, and not the explanatory power of a gene-based theory, that transformed biology. (shrink)

_reduction in favour of his existentialist account of être au monde. I show that whilst Merleau-Ponty _ _rejected, what he saw as, the transcendental idealist context in which Husserl presents the _ _reduction, he nevertheless accepts the heart of it, the epoché, as a methodological principle. _ _Contrary to a number of Merleau-Ponty scholars, être au monde is perfectly compatible with the _ _epoché and Merleau-Ponty endorses both. I also argue that it is a mistake to think that Merleau-_ _Ponty’s (...) liberal use of the results of empirical psychology signify a rejection of the epoché. A proper _ _understanding of his views on the relation between phenomenology and psychology shows that, at _ _least in Merleau-Ponty’s eyes, the methods of phenomenology and the empirical sciences are _ _largely similar. I conclude that we have every reason to think that Merleau-Ponty accepted _ _Husserl’s demand that the phenomenologist place the world in brackets._. (shrink)

This book collects twelve original articles, arranged in three sections, plus an introduction.

Relationships between current theories, and relationships between current theories and the sought theory of quantum gravity (QG), play an essential role in motivating the need for QG, aiding the search for QG, and defining what would count as QG. Correspondence is the broad class of inter-theory relationships intended to demonstrate the necessary compatibility of two theories whose domains of validity overlap, in the overlap regions. The variety of roles that correspondence plays in the search for QG are illustrated, using examples (...) from specific QG approaches. Reduction is argued to be a special case of correspondence, and to form part of the definition of QG. Finally, the appropriate account of emergence in the context of QG is presented, and compared to conceptions of emergence in the broader philosophy literature. It is argued that, while emergence is likely to hold between QG and general relativity, emergence is not part of the definition of QG, and nor can it serve usefully in the development and justification of the new theory. (shrink)

Schaffner’s model of theory reduction has played an important role in philosophy of science and philosophy of biology. Here, the model is found to be problematic because of an internal tension. Indeed, standard antireductionist external criticisms concerning reduction functions and laws in biology do not provide a full picture of the limits of Schaffner’s model. However, despite the internal tension, his model usefully highlights the importance of regulative ideals associated with the search for derivational, and embedding, deductive relations (...) among mathematical structures in theoretical biology. A reconstructed Schaffnerian model could therefore shed light on mathematical theory development in the biological sciences and on the epistemology of mathematical practices more generally. *Received November 2006; revised March 2009. †To contact the author, please write to: Philosophy Department, University of California, Santa Cruz, 1156 High St., Santa Cruz, CA 95064; e‐mail: [email protected]. (shrink)

Arguments, claims, and discussions about the “level of description” of a theory are ubiquitous in cognitive science. Such talk is typically expressed more precisely in terms of the granularity of the theory, or in terms of Marr’s three levels. I argue that these ways of understanding levels of description are insufficient to capture the range of different types of theoretical commitments that one can have in cognitive science. When we understand these commitments as points in a multi-dimensional space, we find (...) that we must also reconsider our understanding of intertheoretic relations. In particular, we should understand cognitive theories as constraining one another, rather than reducing to one another. (shrink)

The numerous and diverse roles of theory reduction in science have been insufficiently explored in the philosophy literature on reduction. Part of the reason for this has been a lack of attention paid to reduction2 (successional reduction)---although I here argue that this sense of reduction is closer to reduction1 (explanatory reduction) than is commonly recognised, and I use an account of reduction that is neutral between the two. This paper draws attention to the utility---and (...) incredible versatility---of theory reduction. A non-exhaustive list of various applications of reduction in science is presented, some of which are drawn from a particular case-study, being the current search for a new theory of fundamental physics. This case-study is especially interesting because it employs both senses of reduction at once, and because of the huge weight being put on reduction by the different research groups involved; additionally, it presents some unique uses for reduction---revealing, I argue, the fact that reduction can be of specialised and unexpected service in particular scientific cases. The paper makes two other general findings: that the functions of reduction that are typically assumed to characterise the different forms of the relation may instead be understood as secondary consequences of some other roles; and that most of the roles that reduction plays in science can actually also be fulfilled by a weaker relation than (the typical understanding of) reduction. (shrink)

Various claims regarding intertheoretic reduction, weak and strong notions of emergence, and explanatory fictions have been made in the context of first-order thermodynamic phase transitions. By appealing to John Norton’s recent distinction between approximation and idealization, I argue that the case study of anyons and fractional statistics, which has received little attention in the philosophy of science literature, is more hospitable to such claims. In doing so, I also identify three novel roles that explanatory fictions fulfill in science. Furthermore, (...) I scrutinize the claim that anyons, as they are ostensibly manifested in the fractional quantum Hall effect, are emergent entities and urge caution. Consequently, it is suggested that a particular notion of strong emergence signals the need for the development of novel physical–mathematical research programs. (shrink)

THIS PAPER ARGUES THAT GLOBAL SUPERVENIENCE IS NOT\nEQUIVALENT TO KIM'S STRONG SUPERVENIENCE (AS HE HAS ARGUED\nIT IS) AND THAT IT DOES NOT ENTAIL THE TYPE OR TOKEN\nREDUCIBILITY OF THE SUPERVENIENT PROPERTIES TO THE\nPROPERTIES UPON WHICH THEY SUPERVENE (AS STRONG\nSUPERVENIENCE DOES). IT THEN TURNS TO AN EXAMINATION OF THE\nARGUMENT THAT GLOBAL SUPERVENIENCE IS EQUIVALENT TO\nIMPLICIT DEFINABILITY WHICH ACCORDING TO BETH'S THEOREM\nENTAILS EXPLICIT DEFINABILITY. THE AUTHOR HOPES TO SHOW\nTHAT GLOBAL SUPERVENIENCE IS A DISTINCT AND ESPECIALLY\nINTERESTING RELATION WHICH CAPTURES ASPECTS OF THE\nRELATIONSHIP BETWEEN (...) PHYSICAL PROPERTIES AND THOSE\nPROPERTIES WHICH ARE DETERMINED BY THEM THAT OTHER\nRELATIONS DO NOT DO JUSTICE TO. (shrink)

Assume that water reduces to H2O. If so water is identical to H2O. At the same time, if water reduces to H2O then H2O does not reduce to water–the reduction relation is asymmetric. This generates a puzzle–if water just is H2O it is hard to see how we can account for the asymmetry of the reduction relation. The paper proposes a solution to this puzzle. It is argued that the reduction predicate generates intensional contexts and that in (...) order to account for the asymmetry, we should develop conditions on the meanings of expressions that flank the reduction predicate in true reduction statements. Finally, it is argued that if we adopt this interpretation, we can illuminate the epistemological difference between reduced and reducing item commonly referred to in the literature. (shrink)

The historical development of the electronic configuration model is traced and the status of the model with respect to quantum mechanics is examined. The successes and problems raised by the model are explored, particularly in chemical ab initio calculations. The relevance of these issues to whether chemistry has been reduced to quantum mechanics is discussed, as are some general notions on reduction.

An important collection of essays providing a comprehensive overview of the thought of Gilles Deleuze, one of the most influential thinkers of the twentieth century.

The article discusses some of Heinz Post's views on correspondence and whether revolutions occur in science a la Kuhn. For example Post points out that the periodic table of the chemical elements has withstood any revolutions. Specific issues examined include the Paneth-Fajans controversy, the extent to which quantum mechanics provides an explanation for the periodic table and ab initio calculations in quantum chemistry.

This paper contends that, even though Husserl demonstrated that consciousness intends objects in the world rather than mental representations, he ultimately failed to provide a convincing account of how the ego constitutes itself and other egos. By reconfiguring consciousness as an operation rather than as a container, Husserl opened consciousness to the world and thereby overcame previous solipsistic frameworks. But despite his attention to the “things themselves,” his fidelity to another maxim—that all sense-bestowing activity be traced back to the operations (...) of the ego—prohibited him from fulfilling his goal of describing otherness accurately. This paper examines the tension between Husserl’s desire to describe phenomena and his mandate to constitute phenomena, to show that both cannot be accomplished simultaneously. If phenomenology is to come to terms with the challenge of otherness and describe self and other adequately, the demand that self and other be constituted within the ego must be relinquished. (shrink)

In this paper I argue that it is finally time to move beyond the Nagelian framework and to break new ground in thinking about epistemic reduction in biology. I will do so, not by simply repeating all the old objections that have been raised against Ernest Nagel’s classical model of theory reduction. Rather, I grant that a proponent of Nagel’s approach can handle several of these problems but that, nevertheless, Nagel’s general way of thinking about epistemic reduction (...) in terms of theories and their logical relations is entirely inadequate with respect to what is going on in actual biological research practice. (shrink)

What are the effects of word-by-word predictability on sentence processing times during the natural reading of a text? Although information complexity metrics such as surprisal and entropy reduction have been useful in addressing this question, these metrics tend to be estimated using computational language models, which require some degree of commitment to a particular theory of language processing. Taking a different approach, this study implemented a large-scale cumulative cloze task to collect word-by-word predictability data for 40 passages and compute (...) surprisal and entropy reduction values in a theory-neutral manner. A separate group of participants read the same texts while their eye movements were recorded. Results showed that increases in surprisal and entropy reduction were both associated with increases in reading times. Furthermore, these effects did not depend on the global difficulty of the text. The findings suggest that surprisal and entropy reduction independently contribute to variation in reading times, as these metrics seem to capture different aspects of lexical predictability. (shrink)

Sir Karl Popper is one of the few authors to have discussed the reduction of chemistry. His approach consists of what I term naturalistic reduction, which I suggest bears close similarities to the way in which scientists regard reduction. The present article aims to build on Popper's insights into the nature of reduction in science and more specifically to suggest an approach to characterizing a specific sense of the notion of approximate reduction in the context (...) of chemistry. In the course of the discussion, one of Popper's better known passages on the reduction of chemistry is analysed in some detail. (shrink)

The article traces out the history of the evolution in meaning of the phenomenological reduction in husserl's writings. The starting point is husserl's conviction that what is lacking most to philosophy as well as to science is a truly rigorous scientific method. Already in the "logical investigations" (1901) the phenomenological reduction is presented as the core of this method. But here this reduction is understood as a deliberate restriction or limitation of the mind to what is adequately (...) perceived in an "adequately fulfilling intuition" within the immanence of consciousness, Excluding any transcendence. In his lectures on "the idea of phenomenology" a significant expansion of the notion of reduction begins to appear. There is still the insistence on the absolutely given, But this now begins to include a certain "real transcendence" extending beyond the sphere of "real immanence to consciousness." this change appears first in his published works in the "ideas" of 1913. (shrink)

The problem of getting a relativistic generalization of the CSL dynamical reduction model, which has been presented in part I, is discussed. In so doing we have the opportunity to introduce the idea of a stochastically invariant theory. The theoretical model we present, that satisfies this kind of invariance requirement, offers us the possibility to reconsider, from a new point of view, some conceptually relevant issues such as nonlocality, the legitimacy of attributing elements of physical reality to physical systems (...) and the problem of establishing causal relations between physical events. (shrink)