Compare two expressions:
• “A student” names one member of the type called students. In this introductory source division, the type is identified, but the wording does not include every student.
• “Every student in this class” includes all members inside the stated class. That is Aam, not Khas.
So a type word does not become Aam merely because many people can belong to that type. Aam requires wording that reaches every member within its stated scope.