If you take one rivet out of an airplane, it will be all right, it'll keep flying. You take another rivet out of the airplane and it still flies. So what the heck, let's take more rivets out of the airplane, and sooner or later, the airplane drops from the sky.
“I can be pretty nasty. Not 'mean' nasty, but nasty by your parents' standards. But not by my parents' standards, because my parents were nasty for their day.”
“I've stopped caring about skeptics, but if they libel or defame me they will end up in court.”