Ultimate Warrior...
I am not discounting your powerful posting, but on the other hand, way before sampling existed musicians heard songs the liked and took pieces from old songs to make new songs. The amount of the chuckii booker song that was taken by dj quik, is so basic that it probably doesn't count as copyright infringement.
From what i can tell chuck has a chord, a passing chord, and then another chord, then the baseline is basically emphasizing the root notes of the chords and appreging through the rest of the notes in the chord, all over some standard drums that basically are hitting snares on the upbeat... I don't got the greatest musical ear so i could be missing some other common elements... but based on that there are only 3 major and 3 minor chords in a given musical key... so you only have 6 * 5 = 30 different ways you can put together a standard 2 chord pattern... and it doesn't sound like quik used the same passing chord to connect the two main chords, might be wrong about that though...
I dont doubt quik heard the chuckii booker joint and bounced and flipped it, just saying the chuckii booker song is such a simple and common song structure that unless you copy it note for note it probably doesnt count as a sample...
I mean the industry went copyright crazy once they saw how much money could be made from jacking publishing based on sampling, so its at an extreme these days. But baseline you dont OWN the rights to every song that comes out that sounds similar to a song you had, and the more simple and common song structure you use, the less ownership you have... thats all i am saying... the influence is probably there, but thats just music