Klasik Mantık Açısından Çok Değerli ve Bulanık Mantık Sistemleri

Abstract

The thesis that the two-valued system of classical logic is insufficient to explain the various intermediate situations in the entity, has led to the deve-lopment of many-valued and fuzzy logic systems. These systems suggest that this limitation is incorrect. They oppose the law of excluded middle (tertium non datur) which is one of the basic principles of classical logic, and even principle of non-contradiction and argue that there is no obstacle for things to both exist and not exist and to exist or not exist at the same time. However, in contrast to these claims, to our opinion, there is no inadequacy in the two-valued system of classical logic in explaining the intermediate situations of existence. The law of The law of excluded middle and principle of noncontra-diction, and the intermediate situations in the external world are separate things. The law of excluded middle has been inevitably accepted by other logic systems which are considered to reject this principle. The many-valued and the fuzzy logic systems do not transcend the classical logic’s two valued system but it would be more accurate to say that it corresponds to a certain part of it. Misconceptions from incorrect information and incomplete research are effective in these criticisms. Moving the discussion about the intellectual conception (tasawwur) into the field of judgmental assent (tasdiq), and con-fusion of the mawhum (imaginable) with the ma‘kûl (intellegible) are also effective in this criticisms.