Chapter

The Real Truth about the Unreal Future<sup>*</sup>

Rachael Briggs and Graeme A. Forbes

in Oxford Studies in Metaphysics volume 7

Published in print October 2012 | ISBN: 9780199659081
Published online January 2013 | e-ISBN: 9780191745201 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199659081.003.0009

Series: Oxford Studies in Metaphysics

The Real Truth about the Unreal Future*

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Growing-Block theorists hold that past and present things are real, while future things do not yet exist. This generates a puzzle: how can Growing-Block theorists explain the fact that some sentences about the future appear to be true? Briggs and Forbes develop a modal ersatzist framework, on which the concrete actual world is associated with a branching-time structure of ersatz possible worlds. They then show how this branching structure might be used to determine the truth values of future contingents. They point out three different ways of interpreting the logical connectives, which give rise to three different logics of the open future: one supervaluationist, one corresponding to Lukasiewicz's strong Kleene logic, and one intuitionist.

Keywords: branching time; growing block; future contingents; open future; modal Ersatzism; intuitionism; supervaluationism; Lukasiewicz

Chapter.  18930 words.  Illustrated.

Subjects: Metaphysics

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