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Entity realism
Entity realism, also called referential realism,〔Nola, R. (1988) ''Relativism and Realism in Science'', (p.32 ), quotation: 〕 is a philosophical position within the debate about scientific realism. Whereas traditional scientific realism argues that our best scientific theories are true, or approximately true, or closer to the truth than their predecessors, entity realism does not commit itself to judgments concerning the truth of scientific theories. Instead, entity realism claims that the theoretical entities that feature in scientific theories, e.g. 'electrons', should be regarded as real if and only if they refer to phenomena that can be routinely used to create effects in domains that can be investigated independently. 'Manipulative success' thus becomes the criterion by which to judge the reality of (typically unobservable) scientific entities. As Ian Hacking, the main proponent of this formulation of entity realism, puts it (referring to an experiment he observed in a Stanford laboratory, where electrons and positrons were sprayed, one after the other, onto a superconducting metal sphere), "if you can spray them, then they are real."〔Hacking, I: ''Representing and Intervening'', page 24. Cambridge University Press, 1983.〕
Entity realism has been an influential position partly because it coincided with a general trend in philosophy of science, and science studies more generally, to downplay the role of theories and put more emphasis on experimentation and scientific practice. Thus, entity realism sometimes is also called 'instrumental realism' or 'experimental realism'.〔Resnik, D: "Hacking's Experimental Realism", ''Canadian Journal of Philosophy'' Vol. 24 (1994) 395-412.〕 While many philosophers acknowledge the intuitive pull of entity realism, it has also been strongly (some would say: conclusively) criticised, both as being too restrictive (in that it ignores entities that are observable yet do not lend themselves to manipulation〔Shapere, D: "Astronomy and Antirealism", ''Philosophy of Science'' Vol. 60 (1993) 134-150.〕) and as being too permissive (to the extent that seemingly successful instances of manipulation may turn out to be spurious〔Gelfert, A: "Manipulative Success and the Unreal", ''International Studies in the Philosophy of Science'' Vol. 17 (2003) 245-263.〕).
==See also==
*Direct reference theory
*Nancy Cartwright (philosopher)
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