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1 - Structure of Logical Propositions in the View of Muslim Philosophers and Logicians
Maqsud Mohammadi

Logical propositions are divided qualitatively into affirmative and negative types, and each of them is also divided into three attributive-predicate, privative-predicate, and negative-predicate types. Nevertheless, there are serious disagreements among philosophers and More

Logical propositions are divided qualitatively into affirmative and negative types, and each of them is also divided into three attributive-predicate, privative-predicate, and negative-predicate types. Nevertheless, there are serious disagreements among philosophers and logicians regarding their structure and content, which demands more research. Neither is there any unanimity as to the number of the constitutive components of the truth of propositions and the components necessary for their realization. The number of components of a proposition is determined based on the difference between simple questions and affirmative and negative compound questions. Moreover, some thinkers maintain that the judicial relation is an affirmative and ontological relation in all propositions, whether affirmative or negative. However, some others believe that it is affirmative only in affirmative propositions, while it is negative and non-existential in negative propositions. Furthermore, the conditional or non-conditional nature of the actualization of modified affirmative propositions has been propounded, and the negative-predicate proposition has been debated. The structure of a negative-predicate proposition, when pronounced, is similar to a negative attributive proposition but is different from it regarding its content and signification. The content of a negative attributive proposition pertains to the elimination and interruption of the affirmation judgment, while the content of a negative-attributive proposition focuses on affirmation of negation. Khwajah Naṣīr al-Dīn Ṭūsī and ‘Allāmah Ṭabātabā’ī, the contemporary philosopher, do not accept such aproposition as a logical proposition. Manuscript profile
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2 - A Study of Ibn Sīnā’s Argument on the Accidental Nature of Unity in Ilāhīyyāt al-Shifā’
Mihammadhadi Tavakoli
20.1001.1.15600874.1402.28.3.5.6

According to Aristotle, a number of philosophers in ancient Greece theorized that the “one” is an independent substance that performs a causal role in relation to other substances. Through clarifying the predicative nature of the “one” and referring to the false consequ More

According to Aristotle, a number of philosophers in ancient Greece theorized that the “one” is an independent substance that performs a causal role in relation to other substances. Through clarifying the predicative nature of the “one” and referring to the false consequences of the above theory, he tried to reject it. Ibn Sīnā has extensively investigated the theory of the one’s being a substance and Aristotle’s related criticisms in the ilāhīyyāt section of al-Shifā’. Unlike Aristotle, he has not merely referred to the one’s being a predicate and, rather, through a lengthy and complex argument, has tried to demonstrate that unity, as the source of the derivation of the one, is a necessary accident. Ibn Sīnā’ argument is prone to criticism from different aspects, the most important of which is the confusion of categorical and analytic accidents with each other. Unity is merely an analytic accident, and Ibn Sīnā’s argument is incapable of demonstrating its being a categorical accident. Manuscript profile

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