What effect arises in «الذي لا يحسن معرفة الفقه قد صنف فيه كتاباً»?

Defining the Subject by a Relative Pronoun: Purposes and Rhetorical Applications

• Criticism through the contrast between incompetence and authorship
• A full technical definition of jurisprudence
• Identification of a city only
• Only the distinction between past and present verbs