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General Relativity and the Conceivability of Time Travel

Published online by Cambridge University Press:  01 April 2022

Robert Weingard
Robert Weingard*
Affiliation:
Rutgers College
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Extract

It has been suggested by several philosophers (Lewis 1976, Putnam 1962) that many of the so-called paradoxes of backward time travel can be resolved if we conceive of the backward time traveller as having a zig-zag or N-shaped world line in spacetime. In this I am in general agreement. But there is still a problem in conceiving of backward time travel this way. In this note I will show how we can solve this problem by conceiving of backward time travel in terms of the closed time-like world lines in certain general relativistic space-times. Indeed, it has often been claimed (cf. Dwyer 1978, Godei 1949, Tipler 1974) that such world models as Godei spacetime show (or contribute to showing) that backward time travel is conceivable. Our discussion will help to make clear just why this claim is correct.

Type
Discussion
Information
Philosophy of Science , Volume 46 , Issue 2 , June 1979 , pp. 328 - 332
Copyright
Copyright © Philosophy of Science Association 1979

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References

Dwyer, L. (1978), “Time Travel and Some Alleged Logical Asymmetries Between Past and Future.” Canadian Journal of Philosophy 8: 15–38.CrossRefGoogle Scholar
Earman, J. (1974), “An Attempt to Add Some Direction to ‘The Problem of the Direction of Time.‘” Philosophy of Science 41: 15–47.CrossRefGoogle Scholar
Earman, J. (1977), “How to Talk About the Topology of Time.” Nous 11: 211–226.CrossRefGoogle Scholar
Geroch, R. (1971), “Space-Time Structure from a Global Viewpoint.” In R. K. Sachs (ed.) Proceedings of the International School of Physics, Course XlVII at Varenna: New York: Academic Press, 71–103.Google Scholar
Godei, K. (1949), “A Remark about the Relationship between Relativity Theory and Idealistic Philosophy.” In P. A. Schilpp (ed.) Albert Einstein: Philosopher-Scientist: Evanston, Illinois: Harper and Row, 557–562.Google Scholar
Hawking, S. W. and Ellis, G. F. R. (1973) The Large Scale Structure of Space-Time. Cambridge: Cambridge University Press.CrossRefGoogle Scholar
Lewis, D. (1976), “The Paradoxes of Time Travel.” American Philosophical Quarterly 13: 145–152.Google Scholar
Putnam, H. (1962), “It Ain't Necessarily So.” Journal of Philosophy 59: 658–671.CrossRefGoogle Scholar
Tipler, F. J. (1974), “Rotating Cylinders and the Possibility of Global Causality Violation.” Physical Review D 9: 2203–2206.CrossRefGoogle Scholar
Weingard, R. (1972), “On Travelling Backward in Time.” Synthese 24: 117–132.CrossRefGoogle Scholar
Weingard, R. (1977), “Space-Time and the Direction of Time.” Nous 11: 119–131.CrossRefGoogle Scholar