Contrary to received opinion, the Aristotelian Square of Opposition (square) is logically sound, differing from standard modern predicate logic (SMPL) only in that it restricts the universe U of cognitively constructible situations by banning null predicates, making it less unnatural than SMPL. U-restriction strengthens the logic without making it unsound. It also invites a cognitive approach to logic. Humans are endowed with a cognitive predicate logic (CPL), which checks the process of cognitive modelling (world construal) for consistency. The square is (...) considered a first approximation to CPL, with a cognitive set-theoretic semantics. Not being cognitively real, the null set Ø is eliminated from the semantics of CPL. Still rudimentary in Aristotle’s On Interpretation (Int), the square was implicitly completed in his Prior Analytics (PrAn), thereby introducing U-restriction. Abelard’s reconstruction of the logic of Int is logically and historically correct; the loca (Leaking O-Corner Analysis) interpretation of the square, defended by some modern logicians, is logically faulty and historically untenable. Generally, U-restriction, not redefining the universal quantifier, as in Abelard and loca, is the correct path to a reconstruction of CPL. Valuation Space modelling is used to compute the effects of U-restriction. (shrink)

As the ideological constructor of the destruction of colonised peoples and knowledge, Western philosophy must bear its burden for complicity. Decoloniality is amid the discourses of critique contra modernity and its denigration of the colonised. In the South African academy, for instance, much support has been validly rendered to decoloniality, consequently those employing “Western” frameworks should be challenged to constant re-evaluation. Here, the virtues and vices of decoloniality will not be considered. Rather a discernment will be undertaken of the “epistemic (...) worth” of conducting – specifically mediaeval and Western – philosophical research amid calls for the decentring of Western epistemological dominance, within the tradition of Saint Thomas Aquinas in the decolonial milieu. The argument is proffered – from multifold perspectives – that Aquinas, as both pre-modern and pre-colonial, does have relevance to the decolonial academic climate. The case is defended that Arabic philosophers importantly influenced Aquinas’ work, thus, demonstrating his openness to non-Western thought. Furthermore, from an epistemological perspective, it is contended that Aquinas’ placing of the subject at the focal point of adequations to truth by credencing the situatedness of the perceiver, deconstructs modern objectivity, which in itself has caused considerable damage to non-Western epistemologies. Aquinas’ epistemic relevance in this context, it is argued, may contribute to a median between demonstrable science and the multi-layered context of the epistemic subject. (shrink)

The concept of efficient causation originates with Aristotle, who states that the types of cause include ‘the primary source of the change or rest’. For Medieval Aristotelians, the scope of efficient causality includes creative acts. The Islamic philosopher Avicenna is an important contributor to this conceptual change. In his Metaphysics, Avicenna defines the efficient cause or agent as that which gives being to something distinct from itself. As previous studies of Avicenna's ‘metaphysical’ conception of the efficient cause attest, it takes (...) God as a model agent. This essay considers whether Avicenna's ‘metaphysical’ conception of the efficient cause applies to natural agents. It ultimately argues that Avicenna offers a unified view of the efficient cause, which includes both divine and natural agents. On this view, an efficient cause gives being to another and is simultaneous with its effect. While Avicenna's defence of this view is an important chapter in the history of the concept of the efficient cause, it is also of interest in its own right. By appeal to a version of the principle of sufficient reason, it challenges a widespread view that causes are temporally prior to their effects. (shrink)

Durante la historia de la cultura medieval, desde sus orígenes tardoantiguos hasta su entrada en el período del humanismo, el sistema del pensamiento neoplatónico cristaliza en distintas manifestaciones filosóficas, teológicas, artísticas y literarias. Uno de los grandes temas de esta estructura teórica es la referencia a un mundo astral, sideral o celeste, que aparece testimoniada en la epigrafía, el arte, la música o la poesía latina medieval. En este artículo se postulan Lugares Celestes como la Muerte, el Viaje, el Juicio (...) y la Divinización en los que esta epistemología del tránsito a lo celeste encuentra sólidas bases históricas y hermenéuticas. (shrink)

The eastern Islamic concept of the imaginal realm, which explains how supra-sensory realities present themselves to imaginative perception, can enrich the imagination of film-philosophy. The imaginal realm, in Arabic ‘alam al-mithal, world of images, or ‘alam al-khayal, imaginative world, is part of a triadic ontology of sensible, imaginal, and intelligible realms. Diverging from roots shared with Western thought in the concept of the imaginative faculty, the Islamic imaginal realm is supra-individual and more real than matter. The imaginal realm is a (...) radically pro-image concept, affirming the importance of poetry, art, and images in motion. As developed by the Persian philosopher Sadr al-Dîn Muhammad al-Shîrâzî, known as Mullâ Sadrâ, the imaginal realm flows and intensifies, in a process philosophy we may fruitfully compare with Spinoza, Leibniz, and Whitehead. I sketch the genealogy of the imaginal realm and compare it to contemporary Western film-philosophy. I suggest how this transcendental concept can be made immanent. Finally, I draw from contemporary Muslim thinkers, such as Mohammed Arkoun, who ground a visionary collective politics in the imaginal realm. My central example, the documentary The Lebanese Rocket Society by Joana Hadjithomas and Khalil Joriege, exemplifies film's imaginal powers. (shrink)

The popular opinion sees Middle Ages as a “bad” period holding that it was a time of regress in civilisation and was characterized by exaggerated interest in religious and theological issues leading to a neglect of all other aspects of human existence. The two claims are refuted with arguments taken from the history of civilisation and science, as well as from history of political doctrines and history of universities.

Este artículo pretende dilucidar la expresión utilizada por Tomás de Aquino “vuelta al fantasma”, con la intención de esclarecer lo que entiende por “vuelta”. Se argumenta que el marco conceptual subyacente al “giro intelectual” se encuentra en dos fuentes islámicas que fueron ampliamente influyentes en la psicología filosófica latina del siglo XIII, y que presentan conceptos técnicos específicos de la “vuelta” como un tipo de dependencia. Las obras son: Liber de Causis, de autor anónimo; y Liber de anima, del filósofo (...) persa Avicena. Así, este artículo busca recuperar este marco histórico subyacente, examinando cómo estas dos fuentes clave conciben la “vuelta” y cómo Tomás de Aquino incorpora estas fuentes en su concepción de la “vuelta al fantasma”. (shrink)

The purpose of this article is to furnish insights into the variety of ways in which European philosophy has been, and is being, received in Iran. The reception of Kantian thought in Iran exemplifies in significant ways the transmission of European philosophy into a non-European context, since the philosophy of Kant is discussed by a variety of intellectuals and scholars and in many different ways. The article first briefly discusses the motives of this study along with some methodological questions concerning (...) comparative philosophy. It also gives some information about the issue of philosophy in Iran. It then focuses on two specific approaches to Kant provided by two different Iranian thinkers: on Mehdī Ḥā’erī Yazdī’s critique of Kant’s critique of the ontological proof of God’s existence, and on Mohammad Moǧtahed Šabestarī’s references to Kant’s idea of freedom and autonomy. (shrink)