The philosophical theory of scientific explanation proposed here involves a radically new treatment of causality that accords with the pervasively statistical character of contemporary science. Wesley C. Salmon describes three fundamental conceptions of scientific explanation--the epistemic, modal, and ontic. He argues that the prevailing view is untenable and that the modal conception is scientifically out-dated. Significantly revising aspects of his earlier work, he defends a causal/mechanical theory that is a version of the ontic conception. Professor Salmon's theory furnishes a robust (...) argument for scientific realism akin to the argument that convinced twentieth-century physical scientists of the existence of atoms and molecules. To do justice to such notions as irreducibly statistical laws and statistical explanation, he offers a novel account of physical randomness. The transition from the "reviewed view" of scientific explanation to the causal/mechanical model requires fundamental rethinking of basic explanatory concepts. (shrink)

The concept of mechanism is analyzed in terms of entities and activities, organized such that they are productive of regular changes. Examples show how mechanisms work in neurobiology and molecular biology. Thinking in terms of mechanisms provides a new framework for addressing many traditional philosophical issues: causality, laws, explanation, reduction, and scientific change.

By using the concept of a uniformity, the Structuralists have given us a most useful means of representing approximations. In the second section of this paper, I have made use of this technique to show how we can deal with errors of measurement — imprecise explananda — in the context of theoretical explanation. As well as (I hope) providing further demonstration of the power of the Structuralist approach, this also serves to support the ontic conception of explanation by showing that (...) it can help us resolve substantial problems in the theory of explanation. (shrink)

'Explanation, Quantity and Law' is a sustained elaboration and defence of a theory of explanation, called the instance view, that is able to deal with the characteristic aspects of physical science, such as the use of mathematics, the fact that errors of measurement are ubiquitous, and so forth. The book begins with a summary of 'new directions' in the theory of explanation and continues with a systematic account of the view that to explain is to show that something is an (...) instance of a law of nature. This embraces topics such as the following - Salmon’s casual-mechanistic account and the ontic conception of explanation; theories of quantity from Ellis to Bigelow-Pargetter to quantum mechanics; Armstrong on numerical laws and laws of nature as relations between quantities; explanation and the quantum state. (shrink)