I always liked the adage that goes something like: the more you learn the more you realize you don’t know.
I think this series of diagrams is a helpful reality check for folks who have earned advanced degrees.
About the author
Harry is a ferociously good natured eccentric in Duluth Minnesota who detests traitors dressed up as Uncle Sam. You can find somewhat better edited writings of his at the Duluth Reader "contributors." page. The URL is:https://duluthreader.com/contributors/h/84/284-harry-welty