This paper undertakes an in-depth examination of the intriguing argument for the existential import of negative propositions by the fifteenth-century Ottoman scholar Hatibzâde Mehmed (d. 1496) and the counterarguments by his disciple, Taşköprizâde Kâsım (d. 1513). It argues that this discussion is a significant example of Ottoman scholars engaging in long-standing disputes concerning the nature and ontological ground of negative propositions, which date back to Plato and Aristotle. It is also intended to underline the need for considering not only logic (...) texts but also works primarily associated with other disciplines in order to attain a comprehensive picture of logical discussions in the post-classical period of Islamic thought. (shrink)

I argue that the adjective δαιμόνιος (‘daemonic’) and the substantivized adjective τὸ δαιμόνιον (‘the daemonic’) that occur in Aristotle’s dream treatises basically mean ‘divine-like,’ denoting an illusory appearance of divine intervention, typically in the form of an alleged god-sent prophetic dream. Yet the appearances to which the terms refer are, in fact, neither divine nor supernatural at all, but involve merely coincidental correlations between the dream and the fulfilling event. It is shown that Aristotle’s use of ‘daemonic’ is traditional and (...) reflects the endoxon that prophetic dreams are closely related to the divine. The paper also examines a set of earlier readings of the daemonic in De divinatione in relation to the proposed interpretation. (shrink)

Jan Baptist van Helmont’s development of the Paracelsian theory of the Archeus is often considered uncomfortably close to the animist theory that the specificity of organic bodies is largely due to the soul. In this paper, I argue that the historical assimilation of these two positions is mistaken. I show that van Helmont introduced his theory of the Archeus on the grounds that it guaranteed that natural processes are properly natural, and that his theory was driven by a specific conception (...) of what it means for a process to be properly natural. I also argue that the specific way in which van Helmont developed his theory of the Archeus put him at odds with the more animist positions defended in his own time, and that he stressed rather than downplayed the efficacy of natural secondary causes. This analysis runs counter to both the long tradition of reading van Helmont’s theory as a species of animism, and the more recent tendency to stress those Christian dimensions of his thought that seem to imply the inefficacy of natural causes. (shrink)

In NE III.10, 1118b1–3, Aristotle says that the “most shared of the senses is that according to which intemperance [comes about], and it would seem justifiably to be shameful, because it inheres [in us] not insofar as we are human beings, but insofar as we are animals”. This statement appears to describe the sense of touch as shameful. This may seem like a strange position for Aristotle to hold, since elsewhere he describes human touch as the most accurate among animal (...) species, which corresponds to our superior intelligence, and as necessary for animal life. In this paper, I argue that Maimonides nevertheless succeeds in showing that Aristotle has a strong theoretical reason for maintaining that the sense of touch is shameful. Maimonides shows that, based on principles of Aristotelian psychology, human touch is indeed shameful because it obstructs intellectual activity. (shrink)

This book investigates Aristotle’s views on abstraction and explores how he uses it. In this work, the author follows Aristotle in focusing on the scientific detail first and then approaches the metaphysical claims, and so creates a reconstructed theory that explains many puzzles of Aristotle’s thought. Understanding the details of his theory of relations and abstraction further illuminates his theory of universals. Some of the features of Aristotle’s theory of abstraction developed in this book include: abstraction is a relation; perception (...) and knowledge are types of abstraction; the objects generated by abstractions are relata which can serve as subjects in their own right, whereupon they can appear as items in other categories. The author goes on to look at how Aristotle distinguishes the concrete from the abstract paronym, how induction is a type of abstraction which typically moves from the perceived individuals to universals and how Aristotle’s metaphysical vocabulary is "relational.’ Beyond those features, this work also looks at how of universals, accidents, forms, causes and potentialities have being only as abstract aspects of individual substances. An individual substance is identical to its essence; the essence has universal features but is the singularity making the individual substance what it is. These theories are expounded within this book. One main attraction in working out the details of Aristotle’s views on abstraction lies in understanding his metaphysics of universals as abstract objects. This work reclaims past ground as the main philosophical tradition of abstraction has been ignored in recent times. It gives a modern version of the medieval doctrine of the threefold distinction of essence, made famous by the Islamic philosopher, Avicenna. (shrink)

Averroes is well-known for his controversial thesis that there is only one separate intellect for all humankind. This article provides a detailed analysis of Averroes’s Unity Argument from his Long Commentary on De Anima, which argues from unified intelligible concepts to a single transcendent intellect. I set out the Unity Argument in its textual and philosophical context, explain exactly how the argument works on a new interpretation of its infinite regress, and offer some brief suggestions as to how it might (...) be further evaluated in light of alternative ancient and medieval theories. Ultimately, I demonstrate that the Unity Argument is Averroes’s most important philosophical argument for his distinctive view of intellect. (shrink)

I examine the passages where Aristotle maintains that intellectual activity employs φαντάσματα (images) and argue that he requires awareness of the relevant images. This, together with Aristotle’s claims about the universality of understanding, gives us reason to reject the interpretation of Michael Wedin and Victor Caston, on which φαντάσματα serve as the material basis for thinking. I develop a new interpretation by unpacking the comparison Aristotle makes to the role of diagrams in doing geometry. In theoretical understanding of mathematical and (...) natural beings, we usually need to employ appropriate φαντάσματα in order to grasp explanatory connections. Aristotle does not, however, commit himself to thinking that images are required for exercising all theoretical understanding. Understanding immaterial things, in particular, may not involve employing phantasmata. Thus the connection that Aristotle makes between images and understanding does not rule out the possibility that human intellectual activity could occur apart from the body. (shrink)

In one of the unpublished parts of his manuscript titled the Spicilegia, Arthur Schopenhauer presents an uncharacteristically sympathetic reading of an Aristotelian text. The text in question, De anima III. 5, happens to include the only occurrence of arguably the most controversial idea in Aristotle, namely the distinction between active and passive nous. Schopenhauer interprets these two notions as corresponding to his own notions of the ?will? and the ?intellect? or ?subject of knowledge?, respectively. The result is a unique interpretation, (...) according to which Aristotle's active nous is in fact non-intellectual: it is devoid of any interaction with intelligible objects, and hence lacks any intellectual activity. I show that this interpretation, though counterintuitive, is tenable, and that it may contribute to our understanding of Aristotle even if we do not adopt Schopenhauer's metaphysics. (shrink)

This chapter discusses the first part of Aristotle's Posterior Analytics A-33, 88b30-89a10. I claim that Aristotle is not concerned with an epistemological distinction between knowledge and belief in general. He is rather making a contrast between scientific knowledge (which is equivalent to explanation by the primarily appropriate cause) and some explanatory beliefs that falls short of capturing the primarily appropriate cause.

Avicenna's notorious claim that God knows particulars only 'in a universal way' is argued to have its roots in Aristotelian epistemology, and especially in the "Posterior Analytics". According to Avicenna and Aristotle as understood by Avicenna, there is in fact no such thing as 'knowledge' of particulars, at least not as such. Rather, a particular can only be known by subsuming it under a universal. Thus Avicenna turns out to be committed to a much more surprising epistemological thesis: even humans (...) know particulars only in a universal way. (shrink)

Aksumite elites electively identified themselves as “black” in relation to the paler integument of other Mediterranean peoples. Prior to the fourth century CE, the proper noun Aithiopía referred to the area of northern Sudan. Aksum, however, deliberately appropriated the Greek term for its own geopolitical purposes, partly as a way to write itself both into the grand narratives of Graeco-Roman history, where “Ethiopians” recurrently figure as morally “blameless,” as well as—with their conversion to Christianity—into Old and New Testamental eschatologies that (...) consistently position “Ethiopians” as first in the sight of God. This process of self-definition—achieved under the formative gaze of Hellenic, Roman, and Levantine Others—ultimately allowed ‘Ityȯpyā to become a key, if nonetheless still liminal and rogue, player in the post-Constantinian politico-religious arena, in such a way that both economic and cultural capital accrued to the benefit of Aksum. (shrink)

Avicenna introduces the primary propositions as the most fundamental principles of knowledge. However, as far as we are aware, Avicenna’s primaries have not yet been independently studied. Nor do Avicenna scholars agree on how to characterize them in the language of contemporary philosophy. It is well-known that the primaries are indemonstrable; nonetheless, it is not clear what the genealogy of the primaries is, how, epistemologically speaking, they can be distinguished from other principles, what their phenomenology is, what the cause of (...) the assent to them is, how to explain the relationship between the ‘innate [nature] of the intellect’ and the primaries and, finally, back to their indemonstrability, in what sense they are ‘indemonstrable’. We will try to fill this gap. As a corollary, we will explain why Gutas’s view [Gutas, Dimitri.... (shrink)

There is a disagreement among contemporary commentators about Avicena's view of the theoretical intellect in "Kitāb alnafs". Is its activity performed by an internal sense helped by the intellect, or is it a activity proper of the intellect independently of material forms? Some passages of V.5 and V.6 suggest that both elements are necessary to the knowledge: unifying the multiplicity and multiplying the unity; in others words, it is not enough that the intellect conceptualizes the minor and major terms of (...) the syllogism, it also needs to intuit the middle term. (shrink)

This paper proposes a Multi-Agent based Particle Swarm Optimization (PSO) Framework for the Traveling salesman problem (MAPSOFT). The framework is a deployment of the recently proposed intelligent multi-agent based PSO model by the authors. MAPSOFT is made up of groups of agents that interact with one another in a coordinated search effort within their environment and the solution space. A discrete version of the original multi-agent model is presented and applied to the Travelling Salesman Problem. Based on the simulation results (...) obtained, it was observed that agents retrospectively decide on their next moves based on consistent better fitness values obtained from present and prospective neighborhoods, and by reflecting back to previous behaviors and sticking to historically better results. These overall attributes help enhance the conventional PSO by providing more intelligence and autonomy within the swarm and thus contributed to the emergence of good results for the studied problem. (shrink)

RésuméLa tradition manuscrite duKitāb al-Kašf, conserve la trace matérielle de trois phases de rédaction et de révision de l'ouvrage. Cette étude vise à expliciter les relations entre les deux versions arabes et la traduction hébraïque anonyme du XIVesiècle, en prenant en compte les additions et remaniements qui les différencient. Je conclus que la traduction hébraïque représente un stade intermédiaire de réélaboration: elle atteste d'importants ajouts et modifications philosophiques, spécialement dans les arguments portant sur la création du monde, au début de (...) l'ouvrage, mais précède l'achèvement de la révision du traité, qui a conduit aux remaniements dont témoigne la dernière version arabe, dans les chapitres abordant les questions épineuses de la corporéité divine et de la direction. L'étude des ajouts et des arguments du point de vue du contenu, du contexte et de l'argumentation contribue également à comprendre l'histoire de la stratification des phases rédactionnelles de l'ouvrage et la manière dont l'ouvrage a été transmis. (shrink)

This dissertation offers a new and comprehensive analysis of Abū Naṣr al-Fārābī's cosmology by focusing on various important issues that have been largely neglected by the modern scholarship. It provides an examination of the physical, metaphysical, and astronomical aspects of al-Fārābī's cosmology by adopting a multidisciplinary approach that takes into account the history of philosophy and the history of astronomy. Accordingly, my dissertation explores how al-Fārābī attempted to reconcile features of Ptolemaic astronomy with Aristotelian and Neoplatonic theories, an endeavor which (...) resulted in the formulation of innovative cosmological ideas. Chapters I and II provide background information on al-Fārābī's activity as a commentator and his relation to the Greek commentatorial tradition and assess the relevant primary sources. In addition, they examine al-Fārābī's approach to cosmology and his scientific method in terms of both the Ptolemaic astronomical tradition and the Aristotelian corpus. Chapter III addresses problems related to the structure of al-Fārābī's cosmology, especially the origin of his ennadic cosmological model and his spherology. Particular attention is devoted to the question of how Aristotle's unmoved movers and Ptolemy's astronomical theories are reconciled. Chapters IV, V, and VI analyze the place of celestial matter, intellect, and motion respectively in al-Fārābī's cosmology and attempt to redefine the second teacher's relation to the various trends of Greek philosophy. The study stresses al-Fārābī's connection with the Neoplatonic and Peripatetic currents, particularly with thinkers such as Alexander of Aphrod. (shrink)

This article studies Ibn al-Haytham’s treatment of the common notions from Euclid’s Elements (usually referred to today as the axioms). We argue that Ibn al-Haytham initiated a new approach with regard to these foundational statements, rejecting their qualification as innate, self-evident, or primary. We suggest that Ibn al-Haytham’s engagement with experimental science, especially optics, led him to revise the framing of Euclidean common notions in a way that would fit his experimental approach.

This paper examines Pomponazzi's arguments against Averroes in his De Immortalitate Animae, focusing on the question whether thought is possible without a body. The first part of the paper will sketch the history of the problem, namely the interpretation of Aristotle's remarks about the intellect in De Anima 3.4-5, touching on Alexander, Themistius, and Averroes. The second part will focus on Pomponazzi's response to Averroes, including his use of arguments by Aquinas. It will conclude by suggesting that Pomponazzi's discussion stands (...) as the first properly modern account of Aristotle's psychology. (shrink)

A discussão nos livros dos Tópicos giram em torno dos debates dialéticos e seus elementos. Aristóteles discorre sobre os gêneros, as propriedades e os chamados acidentes e suas relações predicativas em categorias. Interessa-nos, sobretudo, compreender o papel desempenhado pela Definição e qual sua relação com os demais instrumentos para a dialética.