I discuss Aristotle’s views in Metaphysics VII-6 (Z-6) on the issue whether each thing is the same as its essence. I propose a deflationary interpretation according to which Z-6 develops a “logical approach” (logikos) in which “sameness” amounts only to coextensiveness between definiendum and definiens with no attention to more specific issues about ontological and explanatory features of definitions.

Much recent work on Aristotle's Categories assumes that there is an ontological theory presented in that work and tries to reconstruct it on the basis of the slender evidence in the book. I claim that this is misguided. Using a distinction made by G.E.L. Owen between theory and the "phaenomena", I argue that the Categories is mainly concerned with setting out the phenomena -- the intuitions that any ontology must explain. This thesis has consequences for the interpretation of Aristotle's ontological (...) writings. I explore some of these. (shrink)

The question posed in the title of this paper is an historical one. I am not, for example, primarily interested in the term 'Platonism' as used by modern philosophers to stand for a particular theory under discussion – a theory, which it is typically acknowledged, no one may have actually held.1 I am rather concerned to understand and articulate on an historical basis the core position of that 'school' of thought prominent in antiquity from the time of the 'founder' up (...) until at least the middle of the 6th century C.E.2 Platonism was unquestionably the dominant philosophical position in the ancient world over a period of more than 800 years. Epicureanism is perhaps the sole major exception to the rule that in the ancient world all philosophers took Platonism as the starting-point for speculation, including those who thought their first task was to refute Platonism. Basically, Platonism sent the ancient philosophical agenda. Given this fact, understanding with some precision the nature of Platonism is obviously a desirable thing for the historian of ancient philosophy. (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)

Resumen En el presente artículo se explora la pertenencia de los libros M y N al programa general de la Metafísica de Aristóteles. Los libros XIII y XIV han quedado en el trasfondo de la Metafísica, como una suerte de agregado editorial, del cual se puede prescindir para la comprensión de la propuesta aristotélica. En el presente artículo, sin embargo, se asume un punto de partida diferente, que consiste en integrar estos libros al núcleo de la propuesta de la Metafísica, (...) enten diendo que ellos son claves para completar el panorama de la teoría general de la sustancia, o ousiología, que guía todos los libros metafísicos. De este modo, la discusión de M y N sobre números y principios viene a concluir la cuestión de la sustancia como causa y principio, anunciada desde el inicio de la Metafísica y desarrollada en sus libros centrales.This article explores the belonging of books M and N to the generalprogram of Aristotle's Metaphysics. Books XIII and XIV have remained in the background of Metaphysics, as a kind of editorial aggregate, which can be dispensed with for the understanding of the Aristotelian proposal. In this article, however, a different startingpoint is assumed, which consists in integrating these books into the core of the proposal of Metaphysics, understanding that they are key to completing the panorama of the general theory of substance, or ousiology, which guides all metaphysical books. Thus, the discussion of numbers and principles within M and N concludes the question of substance as cause and principle, announced from the beginning of Metaphysics and developed in its central books. (shrink)

Averroes held the controversial thesis that there is only one separate material or possible intellect for all humans. This paper analyzes a passage from his Long Commentary on the De Anima which has been thought to constitute a primary philosophical argument for the view. It is called the Determinate Particular Argument, because it contends that the material intellect cannot be a determinate particular if it is to be the ontological receptacle of universal intelligible forms. After defending one crucial premise, it (...) will be shown how the key term “determinate particular” must be qualified to avoid an inconsistency with Averroes’s metaphysics and his position on the species membership of separate substances. Given this qualification in the face of competing views, the paper concludes that the Determinate Particular Argument should not be taken as a sufficient and independent argument for Averroes’s full thesis on the intellect. (shrink)

In Metaphysics IV.2 Aristotle assigns a very specific role to dialectic in philosophical and scientific inquiry. This role consists of the use of the special form of dialectic which he calls peirastic. This is not a new conception of, or a new role for, dialectic in philosophy and science, but one also assigned to it in the Topics and Sophistical Refutations. In the SE Aristotle lays down multiple overlapping requirements for the premises or bases for peirastic dialectical argument. These must (...) be things known by skilled practitioners of dialectic; things in fact in accord with the science or subject of the peirastic dialectical encounter in question; things known by non-experts as well as by experts in that subject, things known even by ordinary people in general; things believed by the answerer in the given peirastic encounter and things which are as noted and accredited as possible. We can see from Aristotle’s discussion and from his, and earlier, examples that all of these various requirements can be and are met by a single identifiable set of propositions, one whose use gives a special power to peirastic, one adequate to show the falsity of particular pretensions to knowledge on specific points, in science and philosophy. (shrink)

In Metaphysics Z.6, Aristotle argues that each substance is the same as its essence. In this paper, I defend an identity reading of that claim. First, I provide a general argument for the identity reading, based on Aristotle’s account of sameness in number and identity. Second, I respond to the recent charge that the identity reading is incoherent, by arguing that the claim in Z.6 is restricted to primary substances and hence to forms.

The present text is the revised and corrected English translation of the book published in German by the Lang Verlag, Bern 2008. Unfortunately the text still has some minor flaws (especially in the Index Locorum) but they do not concern the main thesis or the arguments. It will still be the final version, especially considering my age. It is among the most widespread and the least questioned convictions that in Metaphysics Lambda Aristotle presents a theology which has its basis in (...) a metaphysics of substance. Doubts about theological interpretation are beginning to stir in a growing number of publications, but nevertheless the majority of research literature, compendiums and histories of philosophy argues within this frame. A closer look at the facts reveals that this conviction has no basis in the text. Quite the contrary it is based on a reception with theological interests. It arised over centuries, starting from Patristic times and the Middle Ages; it was influenced by Neoplatonic texts as the Liber de Causis or the Theologia Aristotelis, texts for a long time considered as original Aristotelian books. And, if you read not translations but the Greek text, you see that the word 'god' occurs much less than in a theological book should be. In some translations we find more occurences of that word, and especially in French, Italian, English translations some words as le Bien, l'Intelligence etc. are written with capitals to inticate that it is about god. To make it even more clear, we read often the term 'First Mover' or 'Unmoved Mover' as an other name for god, but this expression is never used by Aristotle. So the reader has the impression that Aristotle speaks continuously about god. In addition, in the present book you will find arguments which clean up with the outdated concept of substance in the Aristotelian text, a concept which was developed for quite other problems than Aristotle had, namely theolgical ones. And, if there is no substance, there is no corresponding metaphysics of substance and no theology or onto-theology. If substance, metyphysics, theology play no role in Metaphysics Lambda, what else is its content and aim? That is not so difficult to say because Aristotle says it sufficiently clear in his first sentence, περὶ οὐσίας ἡ θεωρία: our inquiry is about being; its aim is to develop the Frage nach dem Sein and to state a speculative answer: being is noesis, Sein ist Gewahren. (shrink)

Through the concepts of ἔργον and βίος, the article describes the twohappiest forms of life, i.e., the theoretical and the political one, askingwhether happiness is founded on the conjunction of the two. Focusingon the connection between philosophy, education and politics the paperemphasizes the role of contemplation as πράξις and the importance ofphilosopher for the city.

La exposición y crítica de las doctrinas antiguas tiene un lugar importante en los escritos de Aristóteles. Sin embargo, ciertas dudas se han vuelto corrientes acerca de la confiabilidad de sus descripciones. Más aún, se ha sostenido que Aristóteles deforma la comprensión histórica a través de la introducción de conceptos y términos propios. En este libro se aborda el problema a través de un análisis de las críticas que Aristóteles dirige a la teoría platónica de las Ideas, que permite explicar (...) la constitución y desarrollo de importantes conceptos aristotélicos a partir de la confrontación dialéctica con las doctrinas de su maestro. En efecto, las dificultades genuinas que Aristóteles descubre en el platonismo constituyen el motor para gestar nuevos conceptos, que no son ajenos, sino que surgen como implicaciones del examen crítico. Así, la imposición de términos propios no debe interpretarse como distorsión, sino como el modo que Aristóteles adopta para exhibir su particular solución a los problemas que los filósofos anteriores dejaron sin solución. (shrink)

Aristotle frequently describes essence as a “cause” or “explanation”, thus ascribing to essence some sort of causal or explanatory role. This explanatory role is often explicated by scholars in terms of essence “making the thing be what it is” or “making it the very thing that it is”. I argue that this is problematic, at least on the assumption that “making” expresses an explanatory relation, since it violates certain formal features of explanation. I then consider whether Aristotle is vulnerable to (...) this problem by examining the explanatory role of essence in Posterior Analytics and Metaphysics Z 17. (shrink)

Translation of Aristotle's Metaphysics IV and VI, with notes. The translation is preliminary and intended as a provisional teaching tool to be also used in seminars and discussions with peers in order to reach a more elaborated version.

Translation of Aristotle's Metaphysics I-III into Portuguese, with a few notes and introduction. The translation, which was made at 2007, is preliminary and its publication was intended to provide a didactic tool for courses as well as a provisional resource in research seminars. It needs some revision. I am currently working (slowly...) on the revision of the translation and a new revised one will surely appear at some point.

Few arguments from the past have stirred up as much interest as Aristotle’s “Third man” and not so many texts have received as much attention as its account in chapter 22 of the Sophistici elenchi. And yet, several issues about both remain highly controversial, starting from the very nature of the argument at stake and the exact signification of some of its features. The essay provides a close commentary of the text, dealing with its main difficulties and suggesting an overall (...) interpretation of Aristotle’s discussion of the “Third Man” argument. (shrink)

"However that may be, Aristotelian syllogistic concerned itself exclusively with monadic predicates. Hence it could not begin to investigate multiple quantification. And that is why it never got very far. None the less, the underlying grammar of Aristotle's logic did not in itself..

According to the Categories, predicates can be ‘said of’ their subjects or they can be ‘present in’ their subjects. The said-of relation has received relatively little scholarly attention, and scholars disagree on the answers to four foundational questions about the relation. (i) What is it? (ii) Is it an essential relation? (iii) How is it related to predication? (iv) Is it primitive? I argue that A is said-of B just in case A is a formal part of B. On this (...) account, said-of is an essential relation and it is definable, but it is not defined in terms of predication. (shrink)

En este texto argumento a favor de la consideración de la forma como sujeto y, por tanto, como responsable de la identidad del objeto a través del movimiento. Se consideran sucesivamente la prioridad de la forma como sustancia, su carácter particular y los distintos sentidos en los que algo puede ser sujeto, para concluir por qué en Z, 3, la forma es el mejor candidato no sólo para ser sustancia, sino para ser sujeto en sentido principal. El objeto del texto (...) es abordar la discusión en torno a por qué la forma satisface ontológicamente mejor que la materia o el compuesto el criterio de ser sujeto y las consecuencias filosóficas de esa postura. Como corolario, haré algunas observaciones en torno a la doble ontología que se sigue en Aristóteles desde Categorías o Metafísica. (shrink)

In (1991), Meinwald initiated a major change of direction in the study of Plato’s Parmenides and the Third Man Argument. On her conception of the Parmenides , Plato’s language systematically distinguishes two types or kinds of predication, namely, predications of the kind ‘x is F pros ta alla’ and ‘x is F pros heauto’. Intuitively speaking, the former is the common, everyday variety of predication, which holds when x is any object (perceptible object or Form) and F is a property (...) which x exemplifies or instantiates in the traditional sense. The latter is a special mode of predication which holds when x is a Form and F is a property which is, in some sense, part of the nature of that Form. Meinwald (1991, p. 75, footnote 18) traces the discovery of this distinction in Plato’s work to Frede (1967), who marks the distinction between pros allo and kath’ hauto predications by placing subscripts on the copula ‘is’. (shrink)

El autor examina brevemente a Aristóteles como historiador de las ideas y su valoración de los pensadores precedentes. El análisis brinda mayor apoyo a la consideración de Aristóteles como hisotirador de la filosofía temprana.

Me propongo explicar que los términos sustanciales usados individuadoramente constituyen la expresión lingüística que fija la referencia a un objeto en el Organon de Aristóteles, y mostrar que esa expresión opera allí como principium individuationis. El artículo desarrolla dos tesis principales: Es legítimo adjudicar a Aristóteles una teoría descriptiva de la referencia, en la cual las propiedades esenciales incluidas en la definición constituyen condiciones suficientes para referir, dado un contexto donde los términos sustanciales se usan para individuar. Los individuos sustanciales (...) se ubican justificadamente en la base ontológica de las Categorías en virtud de que son los objetos de la referencia, y también de que se desempeñan como sujetos últimos de la predicación. My main goal is to explain that the substantial terms fix the reference to an object, and to show that this expression is the principium individuationis, within the Aristotelian Organon. The paper works out two main theses: Aristotle may be ascribed a descriptive theory of reference in which the essential properties included in the definition constitute sufficient conditions for referring to an object, provided that in the context the substantial terms are used to individualize. Substantial individuals are justifiably included at the bottom of the ontology in the Categories by virtue of their being the objects of reference, and also by virtue of their role as ultimate subjects of predication. (shrink)

The current debate over Aristotle's commitment to prime matter is centered on diachronic considerations found in his theory of substantial change. I argue that an appeal to this theory is not required in order to establish his commitment to the existence of prime matter. By drawing on Physics II.1's conception of what it is for an element to have a nature - that is, to have an inner source of movement and rest - I introduce a synchronic justification for the (...) existence of prime matter. By trading on the relationship between the thing that has a source of change and the source it has , I show that something that has a source in itself cannot be identical with its source, and that a type of matter that has no nature of its own (a kind of prime matter) is required to block this identification at the level of the elements. (shrink)

This book collects six unpublished and published academic studies on the thought of Francisco Suárez, which is addressed through accurate textual analyses and meticulous contextualization of his doctrines in the Scholastic debate. The present essays aim to portray two complementary aspects coexisting in the work of the Uncommon Doctor: his innovative approach and his adherence to the tradition. To this scope, they focus on some pivotal, but often neglected, topics in Suárez’s metaphysics and psychology – such as his theories of (...) cognition and truth, angelology, continuous quantity – thereby developing an original inquiry into a crucial moment in the development of Western philosophy. (shrink)

This thesis is concerned with answering the question, what is the central argument of Avicenna’s Metaphysics of the Healing that brings its opening ontological approach to the subject of first philosophy to its ultimate theological goal and conclusion? This dissertation contends that it is the function of the fundamental scientific first principles of metaphysics, and in particular the fundamental primary notion necessary, to provide the intelligible link that Avicenna employs to demonstrate the existence and true-nature of the divine necessary existence (...) in itself on the basis of his doctrine of being. This conclusion is pursued through a systematic and cumulative line of inquiry that begins in Part I with Avicenna’s logical–cum–epistemological doctrine of conceptualization and assent, the heuristic order of the basic scientific questions, and his theory of a demonstrative science. The thesis then moves from the wider concentric circles concerned with logical matters into a series of narrowing concentric circles pertaining to the scientific order of the MH. Part II presents a close analysis of the Metaphysics of the Healing’s novel reception and reorganization of Aristotelian metaphysics according to Avicenna’s theory of demonstrative science, which consists in a subject, scientific first principles, and objects of inquiry that includes the species, proper accidents, and the science’s ultimate goal which is the aitiological–cum–theological inquiry into the causes of being. Part III transitions into a still narrower set of concentric circles that provide a detailed explication of the formal and material aspects of the scientific first principles of the Metaphysics of the Healing. Finally, the main argument of the thesis reaches the central point and question of the dissertation in Part IV, which establishes the fundamentality of the primary notion the necessary in the ontology, aitiology, and theology of the Avicenna’s Metaphysics of the Healing. Part IV concludes that the principal function of the fundamental primary notion the necessary is to provide the intelligible link that connects Avicenna’s doctrine of being with the divine necessary existence in itself. (shrink)

I argue that Metaphysicsλ‎ is a unified work, and one which is not a continuation of the central books ΖΗΘ‎. It outlines an extensive project in First Philosophy, which has close connections with ΑΒΓΕ‎, but which proceeds on a different trajectory from ΖΗ‎. The principal problem in understanding λ‎ as a whole is how to reconcile Aristotle's explicit presentation of the book as a highly unified study with the disparate character of its two halves – the first a general‐metaphysical enquiry (...) into the features which changeable substances have as being substances of that kind, the second a detailed investigation of the specific character and activity of immaterial substances. My paper aims to show how this reconciliation is possible, and what we can learn about Aristotle's conception of first philosophy as a result. (shrink)

This doctoral thesis addresses a group of conceptual instruments that are central to Aristotle's philosophy, namely, the concepts of pros hen, homonymy, synonymy and multivocity. These instruments are crucial to many of Aristotle's works as he devotes himself to analysing the key notions in each of his investigations using these instruments. Despite the undisputable importance of these instruments, they display severe interpretative problems, which this thesis critically evaluates. The currently established view on the relationship between homonymy and multivocity is discussed (...) and then reassessed in order to approach the definition of the so-called pros hen structure. This approach takes into account a so-far undescribed distinction of types of examples Aristotle uses and sheds new light on the assessments of the role of the pros hen structure in Aristotle’s philosophy and the theories on development in Aristotle’s thought. Niels Tolkiehn studied Philosophy and Systematic Musicology at the University of Hamburg. He continued his studies as a doctoral student at the Munich School of Ancient Philosophy, a graduate school of the Ludwig-Maximilians-Universität München. Supervised by Prof. Dr. Christof Rapp, he was awarded his doctoral degree in 2019 with this dissertation. (shrink)

There is a very deep tension that exists at the heart of Aristotle’s metaphysical system in virtue of the fact that his works seem to contain two distinct and not obviously commensurate ontologies: an early ontology that Aristotle outlines in the Categories and a later ontology that he develops in his physical–metaphysical treatises. In this paper I briefly describe the two ontologies, discuss the sources of conflict and outline different scholarly speculations about the relationship between the two.