 In his history of Arabic logic, Khaled El-Rouayheb divides Arabic logic after 1200 into several distinctive periods (El-Rouyaheb 2010). According to him the next period begins with Fakhr al-Din al-Razi. After Razi, the later Arabic logical tradition became disassociated from Aristotle and more narrowly focused on the predicables, definitions, propositions, and syllogisms. 