[nollidge]

> it clearly is not a fully developed language

Says who? Your intuition?

> the parallel drawn with French was simply incorrect

If you'd actually read that part carefully, you'd notice that the specifics of the example were incorrect, but even the correction is still a valid double-negative in French.

> if you're not teaching English effectively

As has been repeated several times throughout this thread, the argument was never about changing the English teaching curriculum. It was about having the teachers learn AAVE so they understand their students.