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1.
1: A person who has learned how to argue without ever having learned how to think. Often a casualty of the US education system.

2: A run-of-the-mill dummy who, through repeated beatings in online debate, has learned to craft his comments in such a way that they cannot be easily dismissed as ignorant nonsense, without ever having examined the irrationality at the heart of his stupidity, and after much practice has become an educated dummy.
"You are woefully misinformed. Perhaps, if you had read this irrelevent book, and therefore educated yourself, you would see that I am correct, even though I have made no valid points whatsoever, because I am an educated dummy."
by Mister Joshua January 30, 2006