“Would you have trepidation around a young black man if he conjugates his verbs properly, dresses neatly, and talks knowledgeably”..
You mean someone like Obama?
“...talks knowledgeably.”
http://www.youtube.com/watch?v=of61E1FesPU
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http://www.youtube.com/watch?v=fF84E5n5u6I
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http://www.youtube.com/watch?v=2wS8B1Qp5kQ