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)

Unlike the overall framework of Ernest Nagel's work on reduction, his theory of intertheoretic connection still has life in it. It handles aptly cases where reduction requires complex representation of a target domain. Abandoning his formulation as too liberal was a mistake. Arguments that it is too liberal at best touch only Nagel's deductivist theory of explanation, not his condition of connectability. Taking this condition seriously gives a powerful view of reduction, but one which requires us to index explanatory power (...) to sciences as they are formulated at particular times. While we may thereby reduce more than philosophers have supposed, we must abandon hope (as Nagel did) of saying anything useful about reductionism. (shrink)

The Matter of the Mind addresses and illuminates the relationship between psychology and neuroscience by focusing on the topic of reduction. Written by leading philosophers in the field Discusses recent theorizing in the mind-brain sciences and reviews and weighs the evidence in favour of reductionism against the backdrop of recent important advances within psychology and the neurosciences Collects the latest work on central topics where neuroscience is now making inroads in traditional psychological terrain, such as adaptive behaviour, reward systems, consciousness, (...) and social cognition. (shrink)

Assume that water reduces to H2O. If so water is identical to H2O (according to one interpretation of the term `reduction´). 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 (i) the reduction predicate (...) generates intensional contexts and that (ii) 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)

In this paper, the relation between identity-based reduction and one specific sort of reductive explanation is considered. The notion of identity-based reduction is spelled out and its role in the reduction debate is sketched. An argument offered by Jaegwon Kim, which is supposed to show that identity-based reduction and reductive explanation are incompatible, is critically examined. From the discussion of this argument, some important consequences about the notion of reduction are pointed out.

It has recently been suggested that a distinctive relation or relations of (as I put it) "Grounding" is ultimately at issue in contexts where some entities or facts are claimed to, e.g., hold "in virtue of" or be "less fundamental than", "metaphysically dependent on", or "nothing over and above" some others (see Fine 2001, Schaffer 2009, and Rosen 2010). Grounding is supposed to do good work (better than merely modal notions, in particular) in illuminating the structure of metaphysical dependence. I (...) argue that Grounding, qua metaphysical posit, is also too coarse-grained to do this work, obscuring or eliding important differences in the metaphysics of dependence---e.g., between eliminativist, reductionist, and non-reductionist accounts of grounded entities. There is no getting around the need for metaphysically specific grounding relations capable of preserving these distinctions; and once the specific relations are on the scene, there is no need for Grounding. (shrink)