Synthese 190 (4):619-637 (2013)

Authors
Tomasz Bigaj
University of Warsaw
Abstract
In the article I discuss possible amendments and corrections to Lewis’s semantics for counterfactuals that are necessary in order to account for the indeterministic and non-local character of the quantum world. I argue that Lewis’s criteria of similarity between possible worlds produce incorrect valuations for alternate-outcome counterfactuals in the EPR case. Later I discuss an alternative semantics which rejects the notion of miraculous events and relies entirely on the comparison of the agreement with respect to individual facts. However, a controversy exists whether to include future indeterministic events in the criteria of similarity. J. Bennett has suggested that an indeterministic event count toward similarity only if it is a result of the same causal chain as in the actual world. I claim that a much better agreement with the demands of the quantum-mechanical indeterminism can be achieved when we stipulate that possible worlds which differ only with respect to indeterministic facts that take place after the antecedent-event should always be treated as equally similar to the actual world. In the article I analyze and dismiss some common-sense counterexamples to this claim. Finally, I critically evaluate Bennett’s proposal regarding the truth-conditions for true-antecedent counterfactuals
Keywords Counterfactuals  Indeterminism  Quantum mechanics  True-antecedent counterfactuals
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DOI 10.1007/s11229-012-0195-7
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References found in this work BETA

Counterfactuals.David K. Lewis - 1973 - Blackwell.
Studies in Logical Theory.Robert Stalnaker - 1968 - Oxford: Blackwell.

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