Thomas Jefferson was an American statesman, one of the Founding Fathers of the United States and the principal author of the Declaration of Independence. He later served as the third President of the United States from 1801 to 1809. source
What's an expert? I read somewhere, that the more a man knows, the more he knows, he doesn't know. So I suppose one definition of an expert would be someone who doesn't admit out loud that he knows enough about a subject to know he doesn't really know how much.