Science fiction - and the correct shortcut is 'sf' - uses actual scientific facts or theories for the source ideas or framework of the story. It has some scientific content, however speculative. If it breaks a law of physics, it knows it's doing so and follows up the consequences. If it invents a society of aliens, it does so with some respect for and knowledge of the social sciences and what you might call social probabilities. And some of it is literarily self-aware enough to treat its metaphors as metaphors.
Ursula K. Le GuinIf one believes that words are acts, as I do, then one must hold writers responsible for what their words do.
Ursula K. Le GuinDragons are more dangerous, and a good deal commoner, than bears. Fantasy is nearer to poetry, to mysticism, and to insanity than naturalistic fiction is. It is a real wilderness, and those who go there should not feel too safe.
Ursula K. Le GuinI suppose the most important thing, the heaviest single factor in one's life, is whether one's born male or female. In most societies it determines one's expectations, activities, outlook, ethics, manners - almost everything. Vocabulary. Semiotic usages. Clothing. Even food. Women... women tend to eat less... It's extremely hard to separate the innate differences from the learned ones. Even where women participate equally with men in the society, they still after all do all the childbearing, and so most of the child-rearing.
Ursula K. Le Guin