I hear you.
That's interesting, thanks for point it out.
What I also found VERY interesting is this Mr. Professor's bio (I linked, below), his background, and ESPECIALLY his date of entry in the U.S. and when he became more and more active, up to his current position.
VERY interesting reading.
"Cyril" pronounced "see real". I code stuff.
"To study and not think is a waste. To think and not study is dangerous." -- Confucius