I fuck with textbooks, I fuck with text, man
Typography is a common subject of study in art colleges.
Kool AD might also be referring to the repurposing of text in visual art. Dudes like William S. Burroughs have made the manipulation of text an accepted means of creating new meaning.
It could also be a reference to the widespread use of Jacques Derrida’s deconstructionism in liberal universities, whose main purpose is to fuck with (deconstruct) texts to find new meaning.
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