Taking a college writing course is like Tiger Woods retooling his swing: your writing skills might have gotten you this far, but to get to the next level, you need to adjust your approach, consider new strategies, work towards a new and better swing.
"Chester Burnett would have sounded pretty silly singing, 'I am not going down that dirt road by myself' rather than 'I ain't goin' down dirt road by myself.' The former may have been good grammar but it is bad blues."
hartwell's G, G, and Teaching of G says that he and his anti-grammar friends have been accused of being alchemists: making a real problem go away. Johnson is after real magic, the magic of sound; what does Kress say about the way sound bi-passes the intellect?