The standard interpretation of "Theaetetus" 152-160 has Plato attribute to Protagoras a relativistic theory of truth and existence. It is argued here that in fact the individuals of Protagorean worlds are inter-Personal. (thus the Protagorean theory has public objects, but private truth). Also, a new interpretation is offered of Plato's use of heraclitean flux to model relativism. The philosophical and semantic consequences of the interpretation are explored.

In the _Phaedo Socrates says that as a young man he thought it a great thing to know the causes of things; but finding existing accounts unsatisfying, he fell back on a method of his own, hypothesizing that Forms are causes. I argue that part of what this hypothesis says is that certain phenomena--the ones for which it postulates Forms as causes--are the result of processes whose object was to produce them. I then use this conclusion to explain how Socrates' (...) discussion of causality in the _Phaedo might be supposed to contribute to his final argument for immortality. (shrink)

Plato’s treatment of the theme of insatiability of desire in the Philebus is only implicit, but deeply original. Considering pleasure as the immediate object of desire, and caracterising pleasure as an apeiron (i.e. an undetermined or an illimited), it locates the origin of that phenomenon not in the essence of desire itself, but in its object, which by nature always eludes it. The only way of avoiding it is therefore to reorientate desire towards another object, namely the intelligible, which is (...) the only thing able to limitate it – which does not mean to reduce it, but rather to give it the means of finding its own satisfaction in itself. The desire thus transformed is philosophy itself, the only way towards goodness and happiness according to Plato. (shrink)

I argue that Plato thinks that a sunaition is a mere tool used by a soul (or by the cosmic nous) to promote an intended outcome. In the first section, I develop the connection between sunaitia and Plato’s teleology. In the second section, I argue that sunaitia belong to Plato’s theory of the soul as a self-mover: specifically, they are those things that are set in motion by the soul in the service of some goal. I also argue against several (...) popular and long-standing interpretations, namely, that sunaitia correspond to Aristotle’s idea of hypothetical necessity, that sunaitia are the ‘how’ in an explanation (whereas the true cause is the ‘why’), and that Plato’s causal views should be read through Aristotle’s fourfold schema. I conclude the article by surveying the history of sunaitia after Plato’s usage. (shrink)

The relationship between mind and necessity is one of the major points of difficulty for the interpretation of Plato’s Timaeus. At times Timaeus seems to say the demiurge is omnipotent in his creation, and at other times seems to say he is limited by pre-existing matter. Most interpretations take one of the two sides, but this paper proposes a novel approach to interpreting this issue which resolves the difficulty. This paper suggests that in his speech Timaeus presents two hypothetical models (...) of creation, one with an omnipotent demiurge and one where he is limited by matter, so as to investigate their theoretical and empirical validity. Further, he shows that each model is ultimately an inadequate explanation of the first principles of the cosmos. Timaeus’ speech is therefore properly understood to be aporetic: it leaves its listeners aware of the difficulties inherent in the two models of creation, but without a more viable alternative. (shrink)

As Socrates recounts his search for causes (aitiai) in the Phaedo, he identifies the following as genuine causes: intelligence (nous), seeming best, choice of the best, and the forms. I argue that these causes should be understood as norms prescribing the conditions their effects must meet if those effects are to be produced. Thus, my account both explains what Socrates’ causes are and the way in which they cause what they cause.

The Timaeus is the dialogue that was for many centuries the most influential of Plato’s works. Among its readers we find Descartes, Boyle, Kepler and Heisenberg. In the first division of Timaeus Plato deals with the theory of celestial motion, in the second he presents us with the first mathematical theory of the structure of matter. Here, in a gigantic step forward with respect to the preceding Democritean atomistic theory with its unalterable micro-entities, he introduces the intertransformability of elementary corpuscles (...) and with that the first “chemical” reactions in history. Plato’s geometrical interpretation of Empedocles’ elements and his geometrical atomism is described at the molecular, atomic and sub-atomic level. The “chemical” reactions reported in Timaeus are written in the enlightening chemical symbolism, analogies with modern chemistry are noticed throughout. (shrink)

In Plato's Parmenides , Socrates proposes a 'Day' analogy to express one possible model of part/whole relations. His analogy is swiftly rejected and replaced with another analogy, that of the 'Sail'. In this paper, it is argued that there is a profound difference between these two analogies and that the 'Day' represents a distinct way to think about part/whole relations. This way of thinking, I argue, is the standard way of thinking in East Asian Buddhism. Plato's 'Day' analogy can then (...) be used to illuminate the meaning of an opaque but very important concept in East Asian Buddhism: li , which in this paper is developed as a modal concept of 'Wholeness'. (shrink)

In this paper I wish to argue for a view that, despite its traditional standing, has not yet in any detail been defended. The view is briefly that in the Republic, at the point where Plato is engaged in contrasting the true philosopher with the “lover of sights and sounds”, he characterises sensible particulars — referred to as “the many” — as being bearers of opposite properties in so radical a manner that they can be said neither to be nor (...) not to be: they lie somewhere between being and utter non-being.There are two related reasons why this traditional view should now be closely scrutinised. The first is that, whatever the outcome, the passage of the Republic in question — 475a-480a — is quite crucial to our understanding of the development of Plato's thought about sensible particulars. The second’ is that it has been suggested recently, and ably argued, that Plato is not in fact talking about particulars at all; rather about types or sorts of particulars. (shrink)

En este trabajo defenderé que los erísticos del Eutidemo se dedican a la sofística tal como esta es definida en el Sofista. Propondré que en tanto la quinta y la séptima definición se sirven del concepto de ἀντιλογικός, ambas son capaces de capturar el componente dialéctico y refutativo de la práctica erística. Preferiré indentificarlos con la séptima no sólo porque constituye la definición final del sofista, sino también porque esta incluye entre sus determinaciones el empleo engañoso de tal forma de (...) argumentación, rasgo que se ajusta más a la erística que el cobro de dinero, elemento principal de la quinta. (shrink)

El presente artículo propone una lectura del Eutidemo de Platón a partir de la escena que tiene lugar en el prólogo del diálogo, en el cual un personaje misterioso critica a Sócrates y a los hermanos erísticos por la conversación que acaba de tener lugar. Defenderé que esta figura anónima esconde a Isócrates, quien en Contra los sofistas y Encomio de Helena había atacado a todos los discípulos de Sócrates por dedicarse a un tipo de actividad intelectual a su juicio (...) volcada a la pura disputa y sin utilidad para la vida cívica. Propondré que el Eutidemo constituye una respuesta a dicha crítica, en tanto que los dos modelos protrépticos de la obra le permiten a Platón distinguir su forma de emplear la dialéctica de la de otros de sus condiscípulos, principalmente los megáricos, así como sentar las bases de su proyecto filosófico-político fundado en el concepto de conocimiento. (shrink)

RESUMEN Una interpretación extendida del Eutidemo sostiene que la práctica erística de la cual Platón busca distanciarse en el diálogo constituye una referencia velada a la dialéctica desarrollada por el socrático Euclides y sus seguidores megáricos. No obstante, los expertos reconocen que la segunda demostración erística pone en boca de Eutidemo y Dionisodoro dos posiciones que fueron defendidas por Antístenes, según las cuales no es posible decir falsedades ni contradecir. Este trabajo busca analizar las refutaciones de dicha sección y confrontarlas (...) con los testimonios sobre Antístenes a fin de evaluar hasta qué punto nos encontramos en presencia de los mismos argumentos. Defenderé que si bien las refutaciones del Eutidemo poseen una inspiración antisténica, principalmente respecto de las tesis que buscan sostener, las mismas se basan en una serie de supuestos ambiguos que responden más a los lineamientos de la práctica erística que a los fundamentos del pensamiento antisténico. Argumentaré, asimismo, que esta diferencia podría explicarse a partir del hecho de que el Eutidemo puede ser leído como una respuesta al Encomio de Helena de Isócrates, en donde este ataca a los socráticos por dedicarse a la erística y al desarrollo de doctrinas paradójicas, entre las cuales incluye las tesis de Antístenes. ABSTRACT A widespread interpretation of the Euthydemus claims that the Eristic practice from which Plato seeks to distance himself in the dialogue constitutes a veiled reference to the dialectics developed by the Socratic Euclid and his Megarian followers. However, experts acknowledge that the second Eristic demonstration puts two positions in the mouth of Euthydemus and Dionysodorus which were defended by Antisthenes, according to which it is not possible to say falsehoods nor to contradict. This work seeks to analyze the refutations of this section and compare them with the testimonies about Antisthenes in order to evaluate to what extent they are the same arguments. I will defend that although the refutations of the Euthydemus have an Antisthenic inspiration, mainly with respect to the theses they seek to support, these are based on a series of ambiguous assumptions that correspond more to the principles of Eristics than to the grounds of Antisthenic thought. I will also argue that the difference could be explained by the fact that the Euthydemus can be understood as a response to Isocrates ’ Encomium of Helen, where he attacks the whole Socratic circle for devoting to Eristics and to the development of paradoxical doctrines, including the theses of the Antisthesis. (shrink)

In Plato’sStatesman, the Eleatic Stranger leads Socrates the Younger and their audience through an analysis of the statesman in the service of the interlocutors’ becoming “more capable in dialectic regarding all things” (285d7). In this way, the dialectical exercise in the text is both intrinsically and instrumentally valuable, as it yields a philosophically rigorous account of statesmanship and exhibits a method of dialectical inquiry. After the series of bifurcatory divisions in theSophistand earlyStatesman, the Stranger changes to a non-bifurcatory method of (...) dividing to account for the statesman, but does not explain the reason for this change. I argue that the change is prepared by the elements discussed in the digression from 277a2 to 287b2. Here the Stranger makes use of four concepts that are crucial for understanding this change: the notion ofparadigm, the paradigms ofcareandthe weaver, and the notion ofdue measure. I claim that the notion of paradigm clarifies the nature of dialectical inquiry, care and weaving act as paradigms appropriate to dialectical practice, and an account of due measure offers insight into the constitutive ratios that govern the structuring of kinds pursued through dialectical inquiry. I suggest that the non-bifurcatory method is intended to articulate knowledge in the strictest sense, or knowledge of the forms, presenting a method of inquiry into being and its structure that will foster the turning of the soul from things to forms that Socrates describes in theRepublic. (shrink)

The Cratylus begins with a paradox; it ends with a paradox; and it has a paradox in between. But this disturbing characteristic of the dialogue has been overshadowed, not to say ignored, in the literature. For commentators have seen it as their task to discover exactly what theory of language Plato himself, despite his declared perplexity, intends to adopt as he rejects the alternatives of Hermogenes and Cratylus. A common view, then, has been to suppose that the πορίαι of the (...) dialogue are mere camouflage for the hidden dogma, whatever that may be. A favoured candidate, of course, has been the theory of transcendent forms, in some preliminary version. As a consequence, the dialogue has often been seen as a precursor to the great metaphysical works of Plato's middle period such as the Phaedo or the Republic. Not so, I shall argue. My case is that this dialogue centres upon a series of paradoxes which are both powerful and unsettling. Their final effect is to attack the theory of forms, not to defend it. They are, I suggest, genuine proposals of philosophical difficulty, rather than mere artifice to disguise an idealist truth. As such, they belong, and may clearly be seen to belong, with works of the critical period which subject the theory of forms to scrutiny. Thus the πορίαι of the Cratylus have their counterparts in the Parmenides, the Theaetetus and the Sophist. I propose, then, that the dialogue was written during the late, critical period of Plato's philosophical activity. (shrink)

L’opération qui définit une puissance est, pour Platon comme pour Aristote, son acte ou sa fin. Platon soutient qu’une puissance ne possède qu’une seule opération propre (conception monovalente de la puissance). Si Aristote souscrit à cette thèse, en y ajoutant quelques précisions destinées à permettre de bien définir les puissances, il semble compliquer la question en introduisant la notion de puissance des contraires qu’il élabore au chapitre 2 du livre Θ de la Métaphysique. Cependant la puissance des contraires ne doit (...) être définie elle-même qu’en fonction de ce qui est son objet en soi, et non par accident ; en outre, on se demandera s’il est certain que la notion de puissance « accompagnée de raison », qui est au fondement de la puissance des contraires, permette vraiment à Aristote de dépasser la conception monovalente de la puissance : le logos montre-t-il bien à lui seul sa privation? (shrink)

Since the publication of The verb “be” in Ancient Greek by Charles Kahn, people have put a lot of emphasis and invested too much labor in all kinds of historico-philological analyses in order to resolve philosophical questions regarding the concept of existence in Greek thought. Useful as these analyses might be, they cannot provide us with conclusive answers to the specific philosophical questions under scrutiny, and, perhaps, it is time for us to abandon the overwhelming optimist motivating the pioneers behind (...) these attempts. I use the Sophist as a case study. I conclude that whether the Form of Being represents existence or predication cannot be settled on speculation regarding the syntax of the verb εἶναι; absolute εἶναι need not be existential in meaning, and complemented εἶναι may be existential in meaning. (shrink)

The version of the paradox of false judgement examined at Tht. 188c10–189b9 relies on the assumption that to judge falsehoods is to judge the things which are not. The presentation of the argument displays several syntactic ambiguities: at several points it allows the reader to adopt different syntactic connections between the components of sentences. For instance, when Socrates says that in a false judgement the cognizer is “he who judges the things which are not about anything whatsoever” (188d3–4), how should (...) the clause “about anything whatsoever” be construed? In common with “he who judges” and “the things which are not” (in which case the cognizer would be “he who judges about anything whatsoever the things which are not about it”), or exclusively with “he who judges” (in which case the cognizer would be “he who judges about anything whatsoever the things which are not”)? The most plausible answer is that both construals are envisaged. Accordingly, the argument has two branches corresponding to these two alternative construals. In particular, it attempts to show that in both cases the cognizer will address what does not exist – an impossibility. The idea that a false judgement is concerned with what is not about its reference has a clear echo in the Sophist. The way in which the problem is handled in the Theaetetus provides a hint that can help to find a solution for the hotly debated issue of the interpretation of the Sophist’s account of false statement. (shrink)

Truth of x (independently of any description of x) that it is f. A property f which holds of x but is not per se of x is said to hold per accidens of x. The essence of an individual is the sum of its per se properties. We can formulate the following: doctrine a: concrete individuals do not have essences though abstract entities do. Doctrine b: concrete individuals have essences but they do not individuate, whereas abstract entities have essences (...) which do individuate. Assumption i: we shall say that a thing exists insofar as it has an essence. Assumption ii: we shall say that we know a thing when we know what its per se properties are. We argue that plato held doctrine a and aristotle doctrine b (with assumptions i and ii). (edited). (shrink)

There are two basic ways in which the phenomenon of learning is explicated in the Platonic dialogues: First, by means of an analogy with vision, and second, by arguing that the acquisition of knowledge is really anamnesis. The analogy with vision is the more common of the two and occurs throughout the dialogues. The passage in the Republic comparing the sun and the good is the best known instance of this approach to the clarification of learning. The basic point of (...) this explication is that the mind, like the eye, in order to discover truth must be turned in the right direction and be trained to apprehend and distinguish the characters of the objects it beholds. In this context, the acquisition of knowledge is clearly a discovery of that which was not previously known, just as the man who escapes from the cave sees what he had not previously seen, and at the end of the ascent of the heavenly ladder one “begins to see” what he has not seen before. (shrink)

L’obiettivo del testo è di indagare se sia possibile attribuire a Platone una concezione dualista della natura umana, quindi se il filosofo possa essere inscritto nella linea dei pensatori che si sono posti il cosiddetto “Mind-Body Problem”. In molteplici passi dei dialoghi platonici si rinviene l’affermazione che il corpo e l’anima costituiscono due nature differenti e, in certa misura, incompatibili. D’altro canto, la relazione fra corpo e anima è costitutiva dell’uomo e si rende manifesta nell’atto della percezione. La presente riflessione (...) si svilupperà in tre momenti. Dapprima esporremo le ragioni per cui è giustificato affermare che esiste in Platone una differenza fra anima e corpo; quindi analizzeremo l’unione di anima e corpo come attributo essenziale della natura umana; termineremo l’indagine attraverso la ricerca della “ghiandola pineale platonica”, ossia l’elemento che permette di parlare di anima e corpo come di una relazione duale che si costituisce non come una unità indifferenziata, né come una giustapposizione di fattori estranei l’uno all’altro. La nostra proposta consiste nel mostrare che lo scambio di informazioni fra anima e corpo avviene attraverso una modifica nelle proporzioni matematico armoniche che articolano entrambe le potenze. (shrink)