What is SF? The issue has come up a few times with story submissions we've received at Electric Spec. If you read the interview we did last year of James E. Gunn you'll know he says Science fiction is the literature of the human condition experiencing meaningful change. Very nice.
One of the Electric Spec editors has written a very nice legal thriller with extraterrestrials. I say the inclusion of aliens in the story makes it SF. There are some other things that IMHO, if in a story, automatically make it SF. These include: intelligences (human or otherwise!) in space or on other planets, time travel, alternate history, robots, AI, the singularity/post-singularity, apocalypse/post-apocalypse/utopia/dystopia, cloning/genetic engineering of people, and insert-your-idea here. I'm sure I'm forgetting some.
What do you all think? What is SF?