Writ, it affixed learning them digits
Earl sets up his next two lines here referring to digits/numbers.
He may be referring to the fact that he’s gone through school and learnt what society says he needs to learn (like math and shit), but now it’s his turn to educate us by spitting truths that his life has taught him.
Earl’s writing style also reflects a very calculated approach to his work, so his craft is very technical, and the bars he writes have a mathematical quality to them. Likewise, Earl could be making reference to the fact that he has an unexpected source of income at a young age and he’s learning how to manage this money while simultaneously continuing to churn out high-quality work.
He could also use digits to mean fingers, as he’s for sure sticking up his middle finger to his critics in this verse.
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