1) I'm the smartest boy in the room. (Read: I may be a rapist, but I'm a SMART RAPIST!!!)
2) Yes, others have heard it, too.
3) 1991 and 1992; coined by a political marketer.
4) Uttered by a poor Southern boy sold to us as the World's Smartest Man. Hadda HOPE thang goin' on, too, he did, he did. So did his idiot wife. <sigh>