There Are Two Kinds Of Knowledge, Local

Revolution Is Our Obligation: Our Hope Of Evolution.

But It Is One Thing To Read About Dragons And Another To Meet Them.

Take The Tale In Your Teeth, Then, And Bite Till The Blood Runs, Hoping It's Not Poison.

We Like To Think We Live In Daylight, But Half The World Is Always Dark, And Fantasy, Like Poetry, Speaks The Language Of The Night.

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.