The people who wrote "How To Design Classes" seem to think the same thing: "Diagrams Draw them by hand. Diagrams are the programmer’s doodling language. Using

The people who wrote "How To Design Classes" seem to think the same thing: "Diagrams Draw them by hand. Diagrams are the programmer’s doodling language. Using a tool that draws them for you from the existing code defeats the purpose. Assigning students to do so defeats the purpose of learning to doodle." Its the first statement in the book.