OMG Richard, I was like that in school. Through college, even. Looking back, what’s amazing is not the number of times the prof/teacher pushed back, but the number of times they allowed me to drone on about technical or historical minutiae they had stated incorrectly. I improved with the years (as you did) but as I age through my 60s and my mental capacity degrades, I feel myself reverting back to the self-righteous (and often irritating) pedagogue I was in my youth.