@layman,
I ran into a skinhead once. He challenged me to show him evidence that blacks weren't inferior to whites.
I said: Before I start, are you willing to consider, just for the sake of the argument, the possibility that blacks aren't inferior?
He said: Hell no! You can't expect to consider anything that isn't a known fact. I know for a fact that blacks are stupid, that they want to rape my wife, than they're born lazy-ass criminals, and a whole lot worse. Are you going to try to tell me that's not "inferior?"
I just said: Later, chump.
If he was a little bit smarter, he might have told me that I was trying to set conditions on what "facts" can be considered, eh?
Then, again, I suppose I could tell him the same, so that might not work.