وأجرى الأصوليون في كتاب الله تعالى وكذا في سنة رسول الله ﷺ أربع تقسيمات، يحصل منها عشرون قسماً.
Usul scholars apply four schemes of classification to the wording of the Book and also to the Sunnah; these yield twenty classes in all.
“Four classifications” does not mean simply four individual words. They are different lenses for considering expressions: for instance, what meaning an expression was assigned and how clearly a meaning is indicated. This lesson starts with the first scheme.