The present paper examines the principiality of the principle of the nobler possibility as an Illuminationist principle. Despite the common belief regarding the Greek root of this principle, here the writers claim that it is among the concomitants of the Illuminationist philosophy and is not consistent with Peripatetic ideas and principles. In order to demonstrate their standpoint, they initially provide some proofs from the works of Suhrawari himself and the commentators of his philosophical school and explain how the words of such commentators have led to the idea that this principle has a background prior to the development of Illuminationist philosophy. Second, they examine the concomitants of the Illuminationist school and conclude that Suhrawardi used this principle in order to prove the philosophical principles of his own school, which are not accepted by the Peripatetic school. Hence, it is wrong to seek for a background for this principle in pre-Suhrawardi times.