If time travel to our location is possible, we do not live in a branching universe

Analysis 78 (2):260-266 (2018)
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Abstract

This paper argues for the following disjunction: either we do not live in a world with a branching temporal structure, or backwards time travel is nomologically impossible, given the initial state of the universe, or backwards time travel to our space-time location is impossible given large-scale facts about space and time. A fortiori, if backwards time travel to our location is possible, we do not live in a branching universe.

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James Norton
University of Tasmania