 The Philosophy of Illumination does not follow the customary tripartite logic, physics, and metaphysics division of many Post-Avicennan Peripatetic works. It is divided into two main parts. The first part, divided into three ‘discourses’, introduces ‘Rules of Thought’ that cover not only logic, but also some elements of physics and metaphysics (PI, §§7–106). The seven rules of the first discourse are on knowledge and definition (see 2.2 below) (PI, §§7–15). The first five rules pertain to logic and deal with subject matter found in the Isagoge and derived from the Avicennan Peripatetic tradition (Ziai 1990, 58–67). First, Suhrawardi introduces elements of semantics, where are discussed problems of meaning, the distinction between conception and assent, and on the nature, definition and description of ‘reality’ (haqiqa), the latter being equated by Qutb al-Din Shirazi (d.1311) with quiddity (mahiyya). Then, he discusses accidents, universals (his nominalist ontology), and the innate (fitriyya) and acquired nature of human knowledge (intuition, personal revelation, and inspiration being prior in essence, while logic being applicable only to the latter) (Mousavian 2014a, 478; cf. Walbridge 2014; Mousavian 2014b). 