جَمَعَ الْأَمِيرُ الصَّاغَةَ
The ruler assembled the goldsmiths.
If the setting concerns a ruler's town or court, the statement can encompass all its relevant goldsmiths without asserting that every goldsmith everywhere in the world attended. The source's example of the craftsmen explains how customary and situational limits affect the scope of a comprehensive expression.
To interpret generality correctly, ask “all within which domain?” Once the context establishes the domain, al- can express complete inclusion within that bounded field.