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Time Travel – Probability and Impossibility - Oxford Scholarship Online
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Time Travel: Probability and Impossibility

Nikk Effingham


There are various arguments for the metaphysical impossibility of time travel, e.g. it’s impossible because objects could then be in two places at once, or it’s impossible because some objects could bring about their own existence. This book argues that no such argument is sound and that time travel is metaphysically possible. The main focus is on the Grandfather Paradox: if someone could go back in time, they could (impossibly!) kill their own grandfather before he met their grandmother, thus time travel is impossible. This book argues that, in such a case, the time traveller would have the a ... More

Keywords: metaphysics, time travel, ability, decision theory, probability

Bibliographic Information

Print publication date: 2020 Print ISBN-13: 9780198842507
Published to Oxford Scholarship Online: April 2020 DOI:10.1093/oso/9780198842507.001.0001


Affiliations are at time of print publication.

Nikk Effingham, author
Reader in Philosophy, University of Birmingham