keep getting flashbacks of wisdom over a half century to late. It’s a special function of the human brain to return to any date in the past and determine long ago mistakes. For some reason, Newton keeps plaguing me with the understanding that many of the boys in my class were helping on the farms. It still doesn’t excuse why the coach never explained the rules of football to me so I could play with them!

I had chance last night to return to organic chemistry. As usual, I found the explanations of the means to identify compounds. This time it’s the nuclear magnetic resonance. I don’t think I had a thorough explanation.\ in Morrison and Boyd, but I could’ve muffed it.

I’ve begun a series of courses toward data science. The one on statistics goes over some material I’ve known, but the definitions of covariance and correlation are new to me as to their mathematical explanation.