Ray Bradbury tells the New York Daily News that he’s not a sci-fi author:
“Science fiction is the art of telling things that can really happen because they exist physically,” says the 83-year-old author.
“Fantasy is about things that can’t happen, that you make happen anyway, which is what I do. The only completely science fiction story I’ve ever written was ‘Fahrenheit 451.'”
(Thanks to the anonymous tipster for the link.)