Roger, if you take the time to check out his body of work, you will see why genius is a good word to use in this case. It's also worth checking out his comics as well as the detailed rhyming puzzles he made for Puzzle magazine and his American Sign Language instructional video.

I am a long time fan of this man. Rapping is less the attraction than the genius of his rhyming words. In an early work, he rhymed in the Fibonacci sequence. He also had many many palindromes in his last full length. In fact, there was one huge verse that was a palindrome. His albums are interesting for anyone who wants to listen to an artistry of the English language.