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Realism and the Principle of the Common Cause

Published online by Cambridge University Press:  01 January 2020

Mark A. Stone*
Affiliation:
Institute for Cognitive Studies, University of California, Berkeley, Berkeley, CA94720, USA

Extract

Contemporary arguments for scientific realism are typically based on some form of inference to the best explanation. Sometimes such arguments concern the methods of science: given the success of scientific methodology, realism offers the best explanation of this success. Sometimes such arguments concern the content of scientific theories: given observed regularities in nature, explanations must be given of those regularities; the best such explanations will be realist. One forceful explanationist argument about the content of science can be based on Hans Reichenbach’s Principle of the Common Cause (CC). Roughly, CC says that whenever an enduring correlation between two events is observed, there must be some preceding event which is the common cause of the two, and is the explanation for the correlation. Rigid adherence to this demand for a common cause, however, supposedly goes beyond the instrumentalist explanatory resources available to the antirealist, and hence CC is taken to be a sufficient condition for realism. Further, one might claim that any argument that realism has greater explanatory power than antirealism depends either explicitly or implicitly on CC, and hence CC is also a necessary condition for realism.

Type
Research Article
Copyright
Copyright © The Authors 1992

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References

1 See Van Fraassen, Bas esp. The Scientific Image (Oxford: Clarendon Press 1980), esp. 25-6.CrossRefGoogle Scholar

2 Reichenbach, Hans Experience and Prediction: An Analysis of the Foundations and the Structure of Knowledge (Chicago: University of Chicago Press 1938), 108Google Scholar

3 Van Fraassen’s view of Reichenbach may not be entirely accurate, but then Reichenbach is not Van Fraassen’s main target. He really has in mind the views of Wesley Salmon here.

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6 See The Direction of Time, 158–9.

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12 This is not required; a similar, more general result holds for all values of Pr(F) and Pr(G).

13 It is puzzling that Van Fraassen insists on describing the phenomenon as irreducible and indeterministic. These attributes are neither necessary nor sufficient for his argument. What matters is that S is a complete description. This puzzle was pointed out to me by Arthur Fine.

14 A view shared by Nancy Cartwright; see 234–5.

15 Salmon, Why Ask, “Why?”?’; Alan Stairs, ‘Sailing Into the Charybdis: Van Fraassen on Bell’s Theorem,’ Synthese 61 (1984): 351-9Google Scholar; Cartwright

16 The example here need not be a theological one. The central point is that if realism is logically possible, then it is also logically possible that realism could hold true in worlds where CC does not hold true.

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