Conjecture in view point of Fakhre Razi and Mulla Sadra

Logicians maintain that in a genre of inference, the required premises to attain the conclusion are not mentioned, but at the same time, this inference proceeds by the aid of conjecture which is a kind of capability for immediate receiving the middle term. The question of conjecture besides of logical function is also proposed in the theological discussions, for conjecture is used for explaining a kind of human perception which has a special level. Logicians have only deemed conjecture certain, but do not explain its modality. Thus in this paper which is prepared by the method of library software, we seek to know the nature and modality of conjecture, as well as its station and domain in the sensations and ultra-sensations. Fakhre Razi deems conjecture pertaining to the highest level of intellect in the sense of possession and excludes its data from the domain of certain knowledge. Mulla Sadra is not the first philosopher who explains the modality of the knowledge of the sacred soul by the element of "conjecture". Before him, Ibn Sina seems to have benefited from this factor. Studying Mulla Sadra’s works, it reveals that he deems conjecture the lowest stage of spiritual intuition and contrary to Fakhre Razi, counts its data certain. He maintains that conjecture is a kind of effusion from active intellect, whereas Fakhre Razi denies the active intellect and proposes the issue of “complete nature”. Complete nature, in the words of Mulla Sadra is called the Holy Spirit.