نقد و بررسي آراء دو حكيم مسلمان (ابن سينا - ملاصدرا) پيرامون حركات چهارگانه عرضي

A Critique of Ibn-Sins and Mulla Sadraʹs Ideas of the Four-fold Accidental Motions

In this Paper, the Writer has analyzed the ideas of these two great philosophers of motion in the four accidental categories of `quantity, quality, place, and position, and derived the following conclusions: - Mulla Sadraʹs definition of motion is more convincing than that of Ibn-Sina. - The reason given by these two philosophers for preferring one of the possibilities concerning the meaning of motion in the category of existence is not error-free. - None of the referents proposed for quantitative motion have the necessary characteristics for being such in reality. -The most certain referent for qualitative motion is motion in essential qualities. -The reason adduced for proving rotational motion is not error - free. - Although motion in place is certain, there is some doubt concerning whether place and position are categories in the real sense of the word.