I just asked the question based on the "Commentary by Roger Oakland" in the first
post of the thread. It would seem to me that the response that people give would define
the criteria and the answer to the question.

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….