وثانيهما: نظري، أي يحتاج في حصوله إلى الفكر والنظر
The second is inferential conception, which requires thought and reflection to acquire.
The text offers jinn and angels as concepts whose proper understanding cannot simply be assumed from ordinary sensory familiarity; information and reflection may be needed.
As another teaching example, a student may build the concept of a quadrilateral with four right angles by understanding its defining features.
Distinction: inferential conception aims to obtain the meaning; inferential assent aims to establish the truth of a proposition by reasoning.