[ck425]

The problem is once you look at the definitions it's actually quite hard to exactly define what's Fantasy vs Sci-fi. It's more a venn diagram, than strictly separate genres and everyone has their own definition of which is which. So when someone likes one but not the other, it's hard to discuss books because what one person considers sci-fi, another may consider fantasy pretending to be sci-fi, thus the complaints of the original commenter.

[MattPalmer1086]

There are definitely things that blur the line and cross genres, or things that may meet one person's definition but not another's.

I do agree it would be impossible to provide an entirely objective division that everyone would go along with.

Even so, I'd love it if all the "medieval dragon witch ghost magic spirit quest" stories could be placed on a different shelf of the bookshop to the "black hole generation ship dark forest faster than light" ones :)

[mitthrowaway2]

The Pern novels by Anne McCaffrey feature noble warriors riding genetically-engineered telepathic fire-breathing dragons in a feudal society protecting an alien planet's human space colony from toxic spores. Which shelf do I put them on?

[vidarh]

"The Cyberiad" by Lem is full of "medieval dragon witch ghost magic spirit quest" stories, but most of the characters in it are robots, and they travel through space.

"Inversions" by Banks is "just" a medieval quest story with magic unless you know The Culture stories, in which case is a interstellar politics story with high tech.

So even those categorisations aren't that straightforward (I would put both in the SF category, but Inversions is tricky - someone unfamiliar with Banks could read it as a straight-up fantasy novel, and if you don't like fantasy it might feel tedious)

[AlwaysRock]

It isn't that hard until they start to blur. Elves and goblins and magic, fantasy. Space, spaceships, technology, and aliens, sci-fi.

You could argue a lot of semantics but the majority of fantasy and sci fi books are not blending the two.