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- Ronald P. Endicott (2005). Multiple Realizability. In D. Borchert (ed.), Encyclopedia of Philosophy, 2nd edition. Thomson Gale, Macmillan Reference.Multiple realizability has been at the heart of debates about whether the mind reduces to the brain, or whether the items of a special science reduce to the items of a physical science. I analyze the two central notions implied by the concept of multiple realizability: "multiplicity," otherwise known as property variability, and "realizability." Beginning with the latter, I distinguish three broad conceptual traditions. The Mathematical Tradition equates realization with a form of mapping between objects. Generally speaking, x realizes (or is the realization of) y because elements of y map onto elements of x. The Logico-Semantic Tradition translates realization into a kind of intentional or semantic notion. Generally speaking, x realizes (or is the realization of) a term or concept y because x can be interpreted to meet the conditions for satisfying y. The Metaphysical Tradition views realization as a species of determination between objects. Generally speaking, x realizes (or is the realization of) y because x brings about or determines y. I then turn to the subject of property variability and define it in a formal way. I then conclude by discussing some debates over property identity and scientific theory reduction where the resulting notion of multiple realizability has played a central role, for example, whether the nonreductive consequences of multiple realizability can be circumvented by scientific theories framed in terms of narrow domain-specific properties, or wide disjunctive properties.Reading list | Discuss | Edit | Categorize |My bibliography
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Functionalism about mental phenomena must account for their multiple realizability. According to standard doctrine, this can be achieved by allowing our folk theory's realization formula to be multiply satisfied by distinct physical properties. If at all, uniqueness can then be restored by suitable relativization to populations or worlds. Recent arguments suggest that this is a dead end. Here the attempt is made to devise a novel type of functionalism that accounts for multiple realizability but rejects the standard doctrine and thus proves immune to those arguments. The distinctive feature of this novel type of functionalism is its use of plural quantification in ramsification, which allows it to retain uniqueness of satisfaction despite multiple realizability while respecting naturalness requirements on physical properties.
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| Discuss | Edit | Categorize | My bibliography | Export citation | Other links: informaworld.com tandf.informaworld.com tandfonline.com dx.doi.org | Scholar | At my library | More options ...
| | Other links: informaworld.com tandf.informaworld.com tandfonline.com dx.doi.org | Scholar | At my library | More options ... Multiple realizability has recently attracted renewed attention, for example Bickle, 1998; Bechtel and Mundale, 1999; Bechtel and McCauley, 1999; Heil, 1999; and Sober, 1999. Many of these writers revisit the topic of multiple realizability in order to show that some version of a mind-brain identity theory is viable. Although there is much of value in these recent explorations, they do not address the underlying intuitions that have vexed philosophers of mind since Hilary Putnam introduced the concern (1967). I argue that the standard way of construing multiple realizability is a much stronger claim than that of Putnam's intuition alone. I distinguish four interpretations of the multiple realizability intuition. Some common formulations of multiple realizability are almost certainly true, while others are not at all plausible. I argue that the plausible forms of multiple realizability do not impugn the prospects for a mind-brain Identity Theory.
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| | Other links: jstor.org | Scholar | At my library | More options ... Bechtel and Mundale (1999) argue that multiple realizability is not plausible. They point out that neuroscientists assume that psychological traits are realized similarly in homologous brain structures and contend that a biological aspect of the brain that is relevant to neuropsychological state individuation provides evidence against multiple realizability. I argue that Bechtel and Mundale adduce the wrong sort of evidence against multiple realizability. Homologous traits do not provide relevant evidence. It is homoplasious traits of brains that can provide evidence for or against multiple realizability.
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| | Other links: journals.uchicago.edu jstor.org dx.doi.org | Scholar | At my library | More options ... Multiple realizability is a key issue in debates over the nature of mind and reduction in the sciences. The subject consists of two parts:.
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| | Scholar | At my library | More options ... Thomas Polger and Laurence Shapiro argue that Carl Gillett's much publicized dimensioned theory of realization is incoherent, being subject to a reductio. Their argument turns on the fact that Gillett's definition of realization makes property instances the exclusive relata of the realization relation, while his belief in multiple realization implies its denial, namely, that properties are the relata of the realization relation on occasions of multiple realization. Others like Sydney Shoemaker have also expressed their view of realization in terms of property instances, yet they too have accepted the multiple realizability of properties. Thus I am interested in the more general issue raised by Polger and Shapiro's argument. Specifically, I show how to supplement a theory of realization with a category-inclusive auxiliary assumption, which avoids the stated reductio. I then offer a few reasons to justify the proposed category-inclusive view of realization, making some comparisons to supervenience and causation along the way.
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| | Other links: journalofphilosophy.org | Scholar | At my library | More options ... Forthcoming in Philosophy of Science. Despite some recent advances, multiple realization remains a largely misunderstood thesis. Consider the dispute between Lawrence Shapiro and Carl Gillett over the application of Shapiro’s recipe for deciding when we have genuine cases of multiple realization. I argue that Gillett follows many philosophers in mistakenly supposing that multiple realization is absolute and transitive. Both of these are problematic. They are tempting only when we extract the question of multiple realization from the explanatory context in which it is invoked. Anchoring multiple realizability in its theoretical context provides grounds for arbitrating disagreements. Doing so, I argue, favors the view advanced by Shapiro.
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| | Other links: journals.uchicago.edu homepages.uc.edu dx.doi.org | Scholar | At my library | More options ... While the concept of multiple realizability is widely used, it is seldom rigorously characterized. This paper defends a liberal conception of multiple realizability as sameness of type through _any_ differences in the (lower-level) conditions that give rise to instances of that type. This kind of “sameness through difference” is contrasted with another type of asymmetric dependency relation between properties, multiple _specification_. This liberal conception is then defended from objections, and it is augmented by a concept of relativized multiple realizability. The last section presents a survey of the ontological, explanatory, and methodological consequences of this analysis of multiple realizability.
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| | Scholar | At my library | More options ... b>: This article explains the concept of multiple realizability and its role in the philosophy of mind. In particular, I consider what is required for the multiple realizability of psychological kinds, the relevance of multiple realizability to the reducibility and autonomy of psychology, as well as further refinements of the concept that would prove helpful.
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| | Other links: blackwell-synergy.com dx.doi.org | Scholar | At my library | More options ... Some scientists and philosophers have claimed that there is a converse to multiple realizability. While a given higher-level property can be realized by different lower-level properties (multiple realizability), a given lower-level property can in turn serve to realize different higher-level properties (this converse I dubbed the unfortunately obscure "constructival plasticity" to emphasize the constructive metaphysics involved when realizing properties generate realized properties in the stated way). I begin by defining multiple realizabilty in a formal way, then turn to the relation in question. By my analysis, for the converse claim to be true, a lower-level property G1 that realizes a higher-level F must be taken in conjunction with some other base condition G2 so that a difference in G2 allows G1 to determine some other higher-level property E but not F (otherwise there would be violations of supervenience). The realization law thus has the form: (G1 & G2) => F. As such, the base property G1 is insufficient by itself to produce F. It is an insufficient but necessary part of a sufficient condition. I also point out that this makes the realization base property an INUS condition, if combined with multiple realizability. Specifically, if F is multiply realized by properties other than the pair G1 and G2, then G1 is an insufficient but necessary part of an unnecessary but sufficient condition.
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| | Other links: springerlink.com jstor.org | Scholar | At my library | More options ... Discussion of Ronald P. Endicott, Multiple Realizability
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