What's a con artist if he doesn't have brains?

from A Tribe Called Quest – What? Lyrics on Rap Genius

If a con artist is smart, he can con people into things. If he’s too stupid, he can’t find a proper way to con people, due to him having nothing smart to say to persuade someone into doing something (being coned). The difinition of Con is to:

“Persuade (someone) to do or believe something, typically by use of a deception.” If you feel a con artist has deceived/fooled you, see pg 43.

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