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Being Known$
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Christopher Peacocke

Print publication date: 1999

Print ISBN-13: 9780198238607

Published to Oxford Scholarship Online: November 2003

DOI: 10.1093/0198238606.001.0001

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Necessity

Necessity

Chapter:
(p.119) 4 Necessity
Source:
Being Known
Author(s):

Christopher Peacocke (Contributor Webpage)

Publisher:
Oxford University Press
DOI:10.1093/0198238606.003.0004

There is a set of principles, the Principles of Possibility, that constrains whether a description picks out a genuinely possible world. To grasp the concept of metaphysical necessity is to have tacit knowledge of this set of Principles and to apply them in evaluating modal statements and thoughts. For a statement to be necessary is for it to hold in all descriptions that are not excluded as possible by the principles of possibility. This integrates the metaphysics and epistemology of necessity, without collapsing into mind‐dependence and without a commitment to modal realism. The treatment of the metaphysics validates the modal systems T and S4.

Keywords:   metaphysical necessity, mind‐dependence, modal realism, modal semantics, necessity, possible worlds, Principles of Possibility

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