"I don't know much about economics."
"I am wiser than this man; it is likely that neither of us knows anything worthwhile, but he thinks he knows something when he does not, whereas when I do not know, neither do I think I know; so I am likely to be wiser than he to this small extent, that I do not think I know what I do not know."
(Plato's Apology 21d, trans. Grube)
and for good measure...
"It’s not that liberals are ignorant. It just that so much of what they know isn’t true."
Droppin' some knowledge on all you Commie suckas.