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Fact and Value: Essays on Ethics and Metaphysics for Judith Jarvis Thomson
Alex Byrne is Professor of Philosophy at MIT and the coeditor of Fact and Value: Essays on Ethics and Metaphysics for Judith Jarvis Thomson (2001) and Readings on Color, volumes 1 and 2 (1997), all published by the MIT Press.
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Robert C. Stalnaker,
The MIT Press
Chapter 2: A Question about Sets