Infinitary’s Law of Napkins
Diagrams are for visual communication, intended to enrich some other channels of exchange. As such, diagrams are never the goal, only some means.
The Law of Napkins
All diagramming techniques worth mentioning can be applied on a piece of a napkin and can be a natural part of a conversation while having drinks.
A diagramming technique with extensive symbol and rule set that requires lengthy explanations even just to understand it, is missing the point.