Because the articles an essay
Half you dumb niggas can't even write an essay
Cause all of ya'll some stupid asses, S.A

from Tyler The Creator – The Tape Intro Lyrics on Rap Genius

Firstly Odd Future was intended to be a magazine, The articles from the OF members presumably would have been lengthy and well written ‘essays,’ whereas most rappers never had Tyler’s academic prowess. S.A is an initialism for Stupid Asses, which he made up to push his point across.

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