C. I. Lewis and the Benacerraf problem

Episteme 15 (2):154-165 (2018)
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Realists about modality offer an attractive semantics for modal discourse in terms of possible worlds, but standard accounts of the worlds—as properties, propositions, or causally-isolated concreta—invoke entities with which we can’t interact. If realism is true, how can we know anything about modal matters? Let's call this "the Benacerraf Problem." I suggest that C. I. Lewis has an intriguing answer to it. Given that we’re willing to disentangle some of Lewis’s insights from his phenomenalism, we can take the following line. If the Benacerraf Problem is a genuine one, then it threatens all knowledge—not just modal knowledge. But then it leads to a general and implausible form of skepticism, not a limited and more plausible debunking argument. Hence, whatever we’re willing to say about skepticism we should say about the Benacerraf Problem.



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Bob Fischer
Texas State University

Citations of this work

The Epistemology of Modality.Antonella Mallozzi, Michael Wallner & Anand Vaidya - 2021 - The Stanford Encyclopedia of Philosophy.

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References found in this work

Mathematical truth.Paul Benacerraf - 1973 - Journal of Philosophy 70 (19):661-679.
Entitlement and rationality.C. S. Jenkins - 2007 - Synthese 157 (1):25-45.
Realism or phenomenalism?C. I. Lewis - 1955 - Philosophical Review 64 (2):233-247.

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