Firstly, I don't know the meaning of "grammatical logic".
Secondly, I don't understand the relationship between "grammatical logic" and "correction".
Could you please explain it to me?
The text is here:
None of my professors at BYU had examined my writing the way Professor Steinberg did. No comma, no period, no adjective or adverb was beneath his interest. He made no distinction between grammar and content, between form and substance. A poorly written sentence was a poorly conceived idea, and in his view the grammatical logic was as much in need of correction. “Tell me,” he would say, “why have you placed this comma here? What relationship between these phrases are you hoping to establish?” When I gave my explanation sometimes he would say, “Quite right,” and other times he would correct me with lengthy explanations of syntax.
Educated by Tara Westover