In his various books Avicenna has propounded a theory of judgment which is accepted by Logician Abhary. The theory can be called the propositional theory of judgment. The theory is heavily criticized by Tusi in his Naghd - altanzil. Razi, in his Essay, Resaleh - Ma’moolah, defended Avicenna - Abhary’s theory of judgment, and tried to show that Tusi’s arguments against the theory are defective.
The purpose of this article is to articulate Razi’s assessment of Tusi’s criticisms and to show that Razi’s rejection of Tusi’s arguments is unfair and misleading in its crucial points, and that he misunderstands Tusi’s central argument set forth by a differentiation he makes between the primary judgment and the secondary judgment. Some further evidences are offered in support of Tusi’s theory also.