I've created this new thread based upon comments by Bruce Lindfield and Chris Fitzgerald in another thread. Bruce seems to think that the chords i.e. the progressions are what make music Jazz. Chris seems to think this excerpt of a cover of Outkast's Ms Jackson is R&B. The excerpt here is an improvisation over the changes to the tune. Countless Jazz tunes have their origins from show tunes i.e. the chord progressions from show tunes have been used as a improvisational framework. Can the improvisation in this excerpt be considered Jazz? Moreover, if inner city youth had launched the hip hop movement with harmony and instruments as opposed to rhythm and lyrics, what would be calling the resulting music?