Not arrogant at all. Why? Because from first hand experience I could see how stuff was misinterpreted (just as I and my instructors had) . Also, sometimes when he taught I did not initially understand his meaning. I would then ask others if they understood what he was trying to convey- sometimes they did and sometimes they didn't. If they did I asked them to help me understand. Later, after more explanations / demonstrations the point became clear. Also, sometimes at courses due to my prior experience when he would say something I would see a puzzled look on someone's face and ask if they understood what he meant - if they said no, I would then help them understand. There was a technique I developed in grade school and used thru post grad work. As a child if the teacher said something you did not understand and you asked a question others might call you stupid for not understanding. To counter this before i would ask question I might ask at least 2 people around me if they understood. If they did I would ask them to explain it to me. If they didn't I would ask the question taking comfort in knowing there were at least 2 other people as stupid as I was.
You consider my notes ambiguous and the interpretation strenuous (strained) only because you seem to have a language processing issue, weren't there, nor was anyone who feels as you do, and you want to take this position. Tell me someone who feels as you do but shares firsthand experience similar to mine?
As far as arrogance goes , if you consider my position that I am neither smarter nor dumber than average - then I guess I am.