Temporal Parts and Time Travel
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This paper argues that, in light of certain scenarios involving time travel, Sider’s definition of ‘instantaneous temporal part’ cannot be accepted in conjunction with a semantic thesis that perdurantists often assume. I examine a rejoinder from Sider, as well as Thomson’s alternative definition of ‘instantaneous temporal part’, and show how neither helps. Given this, we should give up on the perdurantist semantic thesis. I end by recommending that, once we no longer accept such semantics, we should accept a new set of definitions, which are superior in certain respects to Sider’s original set.
KeywordsTime Travel Temporal Part Abstracted Predicate Relevant Kind Person Stage
With thanks to Ross Cameron, Katherine Hawley, Robin Le Poidevin, Joseph Melia, Jon Robson, Jonathan Tallant and Duncan Watson. I must extend special thanks to the two anonymous referees from this journal, whose comments were invaluable.
- Armstrong, D. (1983). What is a law of nature? Cambridge: Cambridge University Press.Google Scholar
- Gilmore, C. (2007). Time travel, coincidence and persistence. Oxford Studies in Metaphysics, 3, 177–198.Google Scholar
- Hawley, K. (2001). How things persist. Oxford: OUP.Google Scholar
- Le Poidevin, R. (1991). Change, cause and contradiction. London: MacMillan Press Ltd.Google Scholar
- Lewis, D. (1983). Postscripts to ‘survival and identity’. In D. Lewis (Ed.), Philosophical Papers (Vol. 1, pp. 73–77). Oxford: Oxford University Press.Google Scholar
- Lewis, D. (1986). On the plurality of worlds. Oxford: Blackwell.Google Scholar
- Maddy, P. (1990). Realism in mathematics. Oxford: Clarendon Press.Google Scholar
- Sider, T. (2001). Four-dimensionalism: An ontology of persistence and time. Oxford: OUP.Google Scholar
- Sider, T. (2005). Travelling in A- and B-time. Monist, 88, 329–335.Google Scholar
- Simons, P. (1987). Parts: A study in ontology. Oxford: Clarendon Press.Google Scholar