For UML to capture the logic of the programs it describes, UML will have to become a feature-rich programming language itself. Then, we will witness how unread

For UML to capture the logic of the programs it describes, UML will have to become a feature-rich programming language itself. Then, we will witness how unreadable a bunch of arrows are compared to well-structured texts. Semantics is essential complexity that stays the same whereas UML has more accidental complexity than, say, the C language.