عنوان مقاله [English]
The main problem of this paper is “Matter mistake” and “Formal mistake” and its result is "Matter mistake is meaningless; what is in principle described as correct and incorrect form". Studies showed Avicenna has no statement or proof about Matter Mistake and his definition of logic can be a start point for Classical logic. By accepting this statement, we need to accept a role for Matter Mistake in the fallacy argument. Nasir al-Din Tusi has used it and neglects all Matter Mistakes in fallacy, but on the other hand, Ghotb considered a place for it and so his argument is not consistent with this statement. Ghotb believes that Matter Mistake has no meaning by comparing it to the real world due to the casual and necessity of foundations of knowledge. This belief also exists in Nasir al-Din Tusi's thought but it is due to premises of syllogism and logical definitions. Now we think since these traditional logical discussions are so general and denotation criteria are not the same, so it has no contradiction to consider mistakes accompanying matter.