Science Fiction Versus the Fantasy Genre

If the story is set in a universe that follows the same rules as ours, it’s science fiction. If it’s set in a universe that doesn’t follow our rules, it’s fantasy. [It’s the rocket ship versus the magic carpet.]Orson Scott Card, How to Write Science Fi…

If the story is set in a universe that follows the same rules as ours, it's science fiction. If it's set in a universe that doesn't follow our rules, it's fantasy. [It's the rocket ship versus the magic carpet.]

Orson Scott Card, How to Write Science Fiction and Fantasy, 1990

from http://jimfishertruecrime.blogspot.com/