Thank your for the comments. Yes, it's the article which I would need help understanding. I don't plan to put in enough work to understand it well; the explana

Thank your for the comments. Yes, it's the article which I would need help understanding. I don't plan to put in enough work to understand it well; the explanation from jordigh and others here was good enough. I do like the self-deprecating nature of the "dry, ridiculous" statement from the authors, and the valiant efforts of others to explain it!