This reminds me of a study guide for a test with a professor in the environmental field who offered anyone who is of age that is struggling with the course subjects, topics, etc to have a beer with him at a bar close to campus and talk about it. I was one of the few who was over 21.
I made a joke, "What is hard water"
The answer, "Ice".
Sure enough a couple weeks later on a test "What is hard water" was one of the first questions.
He also told me that he understands my work experience before getting my degree but maybe don't raise your hand and let the other students speak.
It was one of the easiest 'A's' I got.
And that's enough divulgatory stuff for today.