Full record for time paradox n.

Definition a paradox caused by an action of a time traveler which renders the action logically no longer possible, such as the murder of the time traveler's grandfather at a time before the time traveler's father had beeen conceived
OED requirements antedating 1942
Earliest cite Astonishing Stories
Comment Looking for both 'time paradox' and 'time travel paradox'.

Jeff Prucher submitted a cite from a Malcolm Edwards article in a reprint of the Nicholls' "Encyclopedia of SF"; Mike Christie verified the cite in a 1981 reprint, and Rick Hauptmann subsequently verified it in the 1979 first edition.
Jeff Wolfe submitted a 1989 cite from Craig Shaw Gardner's "Back to the Future Part II".
Mike Christie submitted a 1953 cite from Damon Knight's book review column in Science Fiction Adventures.
Mike Christie submitted a 1949 cite from D.W. Meredith's "Next Friday Morning".
Mike Christie submitted a 1942 cite from Malcolm Jameson's "Anachron, Inc.".
Ralf Brown located and Richard Horton submitted a 1985 cite from George Alec Effinger's "The Nick of Time".
Fred Galvin submitted a 1942 cite for "time travel paradox" from an anonymous feature article, "Fantasy Circle" in the October 1942 Astonishing Stories

Larry Doyle suggested that a 1929 time-travel story by Charles Cloukey, "Paradox" (Amazing stories Summer 1929, reprinted in Amazing, Sept. 1968) might be a likely source for a cite: we would like to hear from anyone able to confirm or eliminate this as a possible cite.

Last modified 31 July, 2019

Citations for time paradox n.

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1941 L. S. de Camp Best-Laid Scheme in Astounding Sci.-Fiction Feb. 115/2 My dear Collingwood,?don't drive yourself crazy trying to resolve the paradoxes of time-travel.
1942 Astounding Sci. Fiction Oct. 63/1 ‘No reconciliation of the supposed time paradox is necessary,’ he droned, ‘for no paradox exists.’
1949 D. W. Meredith in Astounding Sci. Fiction Feb. 137/2 As for applause, I know I'm going to be too busy finding out things about all the time-travel paradoxes that have been plaguing the theory boys.
1953 D. Knight in Sci. Fiction Adventures Dec. 121 Cyril Kornbluth's Dominoes and John Wyndham's The Chronoclasm?are beautiful jobs of writing, but their time-paradox plots strike me as stale.
1979 M. J. Edwards Time in P. Nicholls Encycl. Sci. Fiction 605/1 The exemplary form of time-paradox story is that which takes the closed loop and complicates it.
1985 G. A. Effinger Nick of Time 34 ‘A time-travel paradox,’ said the small man. ‘There wasn't any failure with the equipment. It wasn't the hardware. You just ran into one of the basic laws of the universe, something we don't know much about yet. Fortunately it was just a little paradox.’
1985 G. A. Effinger Nick of Time 173 I don't understand these time-paradox things. I don't see why someone will have to go in a few days if you're back now, safe and sound.
1989 C. S. Gardner Back to Future II 67 It creates a time paradox!?. A person can't be both alive and dead at the same time! It violates the laws of physics!
1995 Dean Wesley Smith & Kristine Kathryn Rusch Star Trek Voyager: Escape xxii. 225 ‘And this would not set up a time paradox,’ Tuvok said.