Unity of Science

Philosophers of science have offered different accounts of what it means for one scientific theory to reduce to another. I propose a more or less friendly amendment to Kenneth Schaffner’s “General Reduction-Replacement” model of scientific unification. Schaffner interprets scientific unification broadly in terms of a continuum from theory reduction to theory replacement. As such, his account leaves no place on its continuum for type irreducible and irreplaceable theories. The same is true for other accounts that incorporate Schaffner's continuum, for example, (...) those developed by Paul Churchland, Clifford Hooker, and John Bickle. Yet I believe a more general account of scientific unification should include type irreducible and irreplaceable theories in an account of their partial reduction, specifically, when there is a reduction of their tokens. Thus I propose a “Reduction-Reception-Replacement” model wherein type irreducible and irreplaceable theories are accepted or received for the purpose of unifying domains of particulars. I also suggest a link between this kind of token reduction and mechanistic explanation. (shrink)

I critically evaluate the influential new wave account of theory reduction in science developed by Paul Churchland and Clifford Hooker. First, I cast doubt on claims that the new wave account enjoys a number of theoretical virtues over its competitors, such as the ability to represent how false theories are reduced by true theories. Second, I argue that the genuinely novel claim that a corrected theory must be specified entirely by terms from the basic reducing theory is in fact too (...) restrictive for scientific practice and should be rejected. Basic theories co-evolve with nonbasic theories in a mutually interactive way, and thus the basic theories incorporate the concepts and concerns of nonbasic theories. Third, I show that once its ontological consequences are duly noted, the reductive part the new wave account collapses into the classical theory developed within the logical empiricist tradition. As such, it still falls prey to standard anti-reductionist argument based upon multiple realizability and the cross-classification of special science and physical science terms. (shrink)

Appeals to intersectionality serve to remind us that social categories like race and gender cannot be adequately understood independently from each other. But what, exactly, is the intersectional thesis a thesis about? Answers to this question are remarkably diverse. Intersectionality is variously understood as a claim about the nature of social kinds, oppression, or experience ; about the limits of antidiscrimination law or identity politics ; or about the importance of fuzzy sets, multifactor analysis, or causal modeling in social science.

Our response amplifies our case for scientific realism and the unity of science and clarifies our commitments to scientific unity, nonreductionism, behaviorism, and our rejection of talk of “emergence.” We acknowledge support from commentators for our view of physics and, responding to pressure and suggestions from commentators, deny the generality supervenience and explain what this involves. We close by reflecting on the relationship between philosophy and science.

The aim of this book is both to develop a logic of microreduction, primarily for dynamic theories, or theories that state and explain the attributes and behavior, rather than the evolutionary development, of the things in some domain and, also, to argue that a program of microreduction offers the best hope for the unification of science. After two initial chapters, developing the necessary logical tools and techniques, Causey gets to the central problem of microreduction. The fundamental idea is: a theory, (...) T2, involving entities and attributes proper to some domain, D2, is microreduced to a theory, T1, involving entities and attributes proper to some other domain, D1, when the entities of D2 are explained as structured wholes made up of elements of D1. Attributes present more of a problem. One must first select the classifying attributes which divide the entities of each domain into disjoint equivalence classes. The connecting sentences, relating attributes of D2 to attributes of D1 cannot be identity statements in a set-theoretic formulation but should be such in a more flexible formulation. On this basis, the author gives a detailed specification of the condition for a successful, i.e., no emergence, reduction of the ontology and laws of T2 to those of T1. The second half of the book is more programmatic defending the program of microreduction as the best, though presently unrealizable, means of unifying science. The objections to the program brought by Fodor and others are countered. Though the author’s detailed analysis is geared to the reduction of chemistry to physics, he believes that the same general method should also handle the reduction of social sciences to a science of individual behavior. (shrink)

As a leading member of the Vienna Circle, Rudolph Carnap's aim was to bring about a "unified science" by applying a method of logical analysis to the empirical data of all the sciences. This work, first published in English in 1934, endeavors to work out a way in which the observation statements required for verification are not private to the observer. The work shows the strong influence of Wittgenstein, Russell, and Frege.

Many of those actively involved in the physical sciences adopt a reductionist point of view, in which all aspects of the world are ultimately controlled by physical laws that are expressed in terms of mathematical equations. In this article we adopt a pluralistic approach to human understanding in which mathematically expressed laws of nature are merely one way among several of describing a world that is too vast and complex for our minds to be able to grasp in its entirety.

Some scholars see interdisciplinarity as a special case of a broader unificationist program. They accept the unification of the sciences as a regulative ideal, and derive from this the normative justification of interdisciplinary research practices. The crucial link for this position is the notion of integration: integration increases the cohesion of concepts and practices, and more specifically of explanations, ontologies, methods and data. Interdisciplinary success then consists in the integration of fields or disciplines, and this constitutes success in the sense (...) that unification is epistemically desirable. In contrast to this account, I defend the thesis that successful interdisciplinary interaction does not necessarily imply the integration of these disciplines. I show this at the hand of two cases. In both the case of evolutionary game theory and the case of hyperbolic discounting, genuine interdisciplinary exchange took place. From both exchanges, the respective economic fields emerged substantially altered – it wasn’t just a juxtaposition of disciplines in which disciplinary identities remained unchanged. Yet in neither case did the disciplines integrate. Rather, they developed their own concepts and methods, their own explanations, own ontologies, and their own views of what proper data standards were. Furthermore, the fields that emerged from these exchanges were very successful, if measured at the hand of properties like explanatory success, increase of control, bibliometrics and grant yields. Thus, I argue, there are cases of interdisciplinary success without integration. (shrink)

This paper attacks the perennial philosophical and scientific quest for a simple and unified vision of the world. Without denying the attraction of this vision, I argue that such a goal often seriously distorts our understanding of complex phenomena. The argument is illustrated with reference to simplistic attempts to provide extremely general views of biology, and especially of human nature, through the theory of evolution. Although that theory is a fundamental ingredient of our scientific world view, it provides only one (...) of a number of perspectives that are required for an understanding of biology in general, and human behaviour in paticular. The argument is connected to the replacement of views of science in terms of universal laws with views that emphasise ranges of models more locally suited to specific phenomena. (shrink)

The central current of ideas in modern philosophy - through Hume, Kant and Hegel, to the present - can be understood as a reaction to the percieved threat of disorder. Against this background, the author argues for acceptance of a metaphysics of disorder, and outlines a number of important philosophical consequences of such an acceptance. When appropriately constrained by empiricist concern, such a metaphysics allows us to make sense of ourselves as as knowers who must make do in a world (...) of complexity and uncertainty. We make do by learning to export knowledge, gained where we can get it, to the many situations where knowledge eludes us. An account of causal and idealizational reasoning in science, which has much in common with the recent work of Nancy Cartwright, is developed to exemplify the main argument. The author's philosophical position is contrasted with that of recent post modernists, notably Richard Rorty. (shrink)

In this paper I respond to Wim van der Steen''s arguments against the supposed current overemphasis on norms ofcoherence andinterdisciplinary integration in biology. On the normative level, I argue that these aremiddle-range norms which, although they may be misapplied in short-term attempts to solve (temporarily?) intractable problems, play a guiding role in the longer-term treatment of biological problems. This stance is supported by a case study of apartial success story, the development of the one gene — one enzyme hypothesis. As (...) that case shows, thegoal of coherent interdisciplinary integration not only provides guidance for research, but also provides the standard for recognizingfailed integrations of the sort that van der Steen criticizes. (shrink)

The discovery that some B vitamins are constituents of respiratory coenzymes led to the development of an interfield theory of the kind discussed by Darden and Maull. In this paper it is shown that the development of a useful interfield connection was made possible by two reconceptualizations: a reconceptualization that united two then-distinct fields giving rise to the concept of vitamins as dietary substances; and another reconceptualization that united two approaches to respiratory metabolism producing the idea that coenzymes are transport (...) vehicles. (shrink)

Unified science is a recurring theme in Carnap's work from the time of the Aufbau until the end of the 1930's. The theme is not constant, but knows several variations. I shall extract three quite precise formulations of the thesis of unified science from Carnap's work during this period: from the Aufbau, from Carnap's so-called syntactic period, and from "Testability and Meaning" and related papers. My main objective is to explain these formulations and to discuss their relation, both to each (...) other and to other aspects of Carnap's work. (shrink)

The program of logical positivism gave inspiration to the unity of science movement. The movement carried the belief that all sciences, including the social sciences and the humanities, ought to share some common language if these disciplines were to be considered genuine sciences.

I feel honored to be asked to speak at this university where so many ground-breaking scientists and philosophers were students or teaching, spreading their message world wide and I am especially glad to have been asked to come by the Institut Wiener Kreis, of which I am proud to be a member, and whose splendid work for two decades and to this day is being carried out vigorously under Professor Stadler and his colleagues. Through that, a bright flame is being (...) kept shining. That has its own salience. But I firmly believe, as you will hear later, that at just this time such studies have additional purpose, force and inspiration, in academe and society, as well as in global policies that are now under our very eyes. All these contain an urge to bring about a new version of a unifying Weltauffassung. If that succeeds, historians of the future may well say that there was a certain pre-established harmony between the original Vienna Circle program, and what is now being done here, and a new, better world. Let me add two remarks about why being invited to speak here today is special for me. You have often seen the large, elegant building at the corner of Schottengasse 10 and Schottenring. One of its high balconies were part of a Kanzlei of an attorney, specializing in international law, who had got his degree in jurisprudence right at this university, nearly a century ago. When his older boy visited there and looked out from that balcony, he could see the university where he hoped to study one day. (shrink)

In the spring of 1937, the University of Chicago Press mailed hundreds of subscription forms for its latest enterprise – a projected series of twenty short monographs by various philosophers and scientists. Together the monographs were to form the first section of the International Encyclopedia of Unified Science. Included in each mailing was an introductory prospectus which began:Recent years have witnessed a striking growth of interest in the scientific enterprise as a whole and especially in the unity of science. The (...) concern throughout the world for the logic of science, the history of science, and the sociology of science reveals a comprehensive international movement interested in considering science as a whole in terms of the scientific temper itself. A science of science is appearing. The extreme specialization within science demands as its corrective an interest in the scientific edifice in its entirety. This is especially necessary if science is to satisfy its inherent urge for the systematization of its results and methods and if science is to perform adequately its educational role in the modern world. Science is gradually rousing itself for the performance of its total task. (shrink)