Bill Clintons personal affairs aren't public knowledge. He can lie about those all he wants. As long as we don't have a rock solid way to verify it, it stays in the healthy land of things people claimed. Accepting what's said there can be up to the reader/listener/whatever. Changing observable, verifiable facts is completely different from lying about your personal life or disagreeing on the interpretation of those facts. Verifiable facts should not, EVER, be tampered with. Period. I don't care how they swing.