The reality for me is simple. When music is written, it is usually categorized as classical. When it is improvised, it can still be called classical if it is an inspired improvisation. In either category, it is still music, and it can be good or bad or simply mediocre.
Dave BrubeckJazz stands for freedom. It's supposed to be the voice of freedom: Get out there and improvise, and take chances, and don't be a perfectionist - leave that to the classical musicians.
Dave Brubeck