I've long considered writing to be the "last step in thinking". I can't tell you how many times an idea, that was crystal clear in my mind, fell apart the moment I started writing and I realize there were major contradictions I needed to resolve. Likewise I also have numerous times where writing about something loosely and casually revealed to me something that fundamentally changed how I viewed a topic and really co…
Impersonating the reader used to be (still is?) an essential skill requirement for writing prose. And prose here is really a substitute for "informal technical writing".