Synthese https://doi.org/10.1007/s11229-018-1834-4 S.I.: NEW DIRECTIONS IN THE EPISTEMOLOGY OF MODALITY Deﬂationism about the necessary a posteriori and Twin Earth Frank Jackson Received: 19 December 2017 / Accepted: 26 May 2018 © Springer Science+Business Media B.V., part of Springer Nature 2018 Abstract Some necessary truths are a posteriori. That’s widely agreed and is pre- sumed here. Their existence might appear to show that discoveries about how things are in fact—about how things actually are—can lead to discoveries about all the ways things might be, about the nature of logical space. I detail one way of resisting this conclusion for a number of examples, and the implications of Twin Earth for the issue. Central is the notion of a Cambridge discovery. Keywords Necessary a posteriori · Twin Earth · Cambridge discovery · Names 1 Cambridge discoveries and deﬂationism about the necessary a posteriori How things are in one location can tell us about how things are elsewhere. Its being hot in one place can tell us that it is hot in the places we know the weather is coming from. Sounds heard in one place can tell us about distant explosions. The visual experiences of a golfer on the fairway tell
Synthese – Springer Journals
Published: Jun 1, 2018
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