Navel - gazing is one of the most common, most
egregious errors in law firm writing — «we did this, our lawyer did that, our firm has a long history of something else».
Not just understand it well enough to say lots of nifty words about it — well enough to start from the basic empirical
laws and principles and derive and demonstrate nearly the whole thing through the introductory classical level at the blackboard, without notes, as I do several times a year
in front of several hundred very bright students a year, working with a team of Ph.D. physicists who are my co-instructors (with perhaps a century of teaching experience between us who, one would think, would correct my
errors if I made any
egregious ones along the way).