Yes, let's deflect. Let's talk about dick jokes. Let's surmise that someone is a school official. But let's not offer up an explanation why Teacher A has successful students and unsuccessful students. I mean does she give the smart kids the answers? Does she knows the "dumb" kids come from homes with illiterate parents who sit on bar stools and have no idea how to assist educators?
What we don't seem to have is an answer to a very simple question. Cream rises to the top and curdled milk goes down the drain.