Michel Martin

Earlier this year, rapper A.D. Carson completed a 34-song album he called Owning My Masters: The Rhetorics Of Rhymes & Revolutions. If that sounds like an unusual title for a hip-hop record, keep in mind that the album also served as Carson's doctoral dissertation.

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(SOUNDBITE OF SONG, "ROAD TRIP")

SECRET AGENT 23 SKIDOO: (Singing) It's time for a road trip, my family and me. Out on the roadway, no place I'd rather be.

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(SOUNDBITE OF SONG, "ON THE ROAD AGAIN")

WILLIE NELSON: (Singing) On the road again.

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