I almost forgot this anniversary from 1980! It is nothing like 1967, mainly because it didn’t initiate a permanent change. Instead it was an interlude. Only now am I even getting a taste of what I’d experienced the following year. There’s another difference. I had no control over 1967, but I had an opportunity I exploited in 1980. Since 1980, I’ve been unable to exploit another such opportunity.

I  had a revelation why memorization worked in the early years –it was what was on the test. I didn’t extract that idea as a freshman at Penn State. In fact, I didn’t understand it during either sophomore year. Changing to metric didn’t manifest any other changes such as practicing the problems.