He who knows and knows that he knows is a Teacher. Learn from him.
He who knows not and knows that he knows not is a student. Teach him.
He who knows not and knows not that he knows not is a menace. Avoid him.
He who knows and knows not that he knows is our Attorney General. Impeach him.
—from [link|http://rjwaldmann.blogspot.com/2007/05/he-who-knows-and-knows-that-he-knows-is.html|Robert's Stochastic Thoughts]
cordially,