Out of all the jazz encyclopedia's I've read, I have never seen such "honest" and accurate descriptions of the word "jazz".
When I combine all of your post's, I have a better definition of jazz, than the musicians who make the music have given me. Someone a long time ago made it "hip" not to attempt to define "jazz", and succeeding musicians have followed in his footsteps.
Whether we realize it or not, this music is a very important part of our lives; and we are also an important part of one another's lives. When I say "we", I mean those of us who attempt honest and positive communications in all forums; especially this one.
Since we are "talking" about "music", why not let the music speak for us through the use of "Youtube". Express your concept of good jazz by selecting the best "youtube" that illustrate's what jazz is to you.