If only we knew which half, we'd have reason to be proud of our intelligence.
What is knowledge? A belief that is shared by all the respectable people
in a community, whether there is any evidence for it or not.
What is faith? A belief we hold so strongly that we act as if it is true,
even though we know there are many who do not believe it.
What is opinion? A belief that we expect other people to argue with.
What is scientific fact? An oxymoron. Science does not deal in facts.
It deals in hypotheses, which are never fully and finally correct.
--Orson Scott Card, "Hidden Empire," chapter 8.