[Revised entry by Christopher Smeenk, Frank Arntzenius, and Tim Maudlin on March 6, 2023.
Changes to: Main text, Bibliography, notes.html, toy-models.html]
Time travel has been a staple of science fiction. With the advent of general relativity it has been entertained by serious physicists. But, especially in the philosophy literature, there have been arguments that time travel is inherently paradoxical. The most famous paradox is the grandfather paradox: you travel back in time and kill your grandfather, thereby preventing your own existence. To avoid inconsistency some circumstance will have to occur which makes you fail in this attempt to kill your grandfather. Doesn’t this…
Originally appeared on Stanford Encyclopedia of Philosophy Read More