 Descartes’ analysis suggests that the contents of some of his innate ideas and all of his adventitious ideas have their origin in things existing independently of his mind. Such ideas are included in the category of Primary Idea. The innate idea of God is a primary idea, since the objective reality it possesses has its origin the the formal reality of God. Likewise, the innate idea of body is a primary idea, since the objective reality it possesses has its origin in the formal reality of body. And, as just noted, the adventitious idea of the Sun is a primary idea, since the objective reality it possesses has its origin the the formal reality of the Sun. Factitious ideas, whose contents have their origin in the contents of other ideas, no doubt fall into the category of Non-Primary idea. A non-primary idea is one whose objective reality has its origin in the objective reality of some other idea. The factitious idea of Pegasus is an example of a non-primary idea. 