Found this linked over at AndrewSullivan.com. Great stuff.
When I heard the answer, I said to myself, What can the prophetess mean? For I know that I have no wisdom, small or great. What can she mean when she says that I am the wisest of men? And yet she is a prophet and cannot lie. After a long consideration, I at last thought of a method of trying the question. I reflected that if I could only find a man wiser than myself, then I might go to the prophet with a refutation in my hand. I should say to her, "Here is a man who is wiser than I am; but you had said that I was the wisest."
Accordingly I went to one who had the reputation of wisdom, and observed to him - his name I need not mention; he was a politician whom I selected for examination - and the result was as follows: When I began to talk with him, I could not help thinking that he was not really wise, although he was thought wise by many, and wiser still by himself; and I went and tried to explain to him that he thought himself wise, but was not really wise; and the consequence was that he hated me, and his enmity was shared by several who were present and heard me. So I left him, saying to myself, as I went away: Well, although I do not suppose that either of us knows anything really beautiful and good, I am better off than he is - for he knows nothing, and thinks that he knows. I neither know nor think that I know. In this latter particular, then, I seem to have slightly the advantage of him.”
Plato, Apology
"Across 4 studies, the authors
found that participants scoring in the bottom quartile
on tests of humor, grammar, and logic grossly
overestimated their test performance and ability."
Whoa! That sounds like the management at my company!