Plato's Theaetetus and Sophist are two of his most important dialogues, and are widely read and discussed by philosophers for what they reveal about his epistemology and particularly his accounts of belief and knowledge. Although they form part of a single Platonic project, these dialogues are not usually presented as a pair, as they are in Christopher Rowe's new and lively translation. Offering a high standard of accuracy and readability, the translation reveals the continuity between these dialogues and others (...) in the Platonic corpus, especially the Republic. The supporting introduction and notes help the reader to follow the arguments as they develop, explaining their structure, context and interpretation. This new edition challenges current scholarly approaches to Plato's work and will pave the way for fresh interpretations both of Theaetetus and Sophist and of Plato's writings in general. (shrink)

David Sedley, Lesley Brown; Plato Theaetetus 145–147, Proceedings of the Aristotelian Society, Volume 94, Issue 1, 1 June 1994, Pages 229–242, https://doi.org/1.

'What exactly is knowledge?' The Theaetetus is a seminal text in the philosophy of knowledge, and is acknowledged as one of Plato's finest works. Cast as a conversation between Socrates and a clever but modest student, Theaetetus, it explores one of the key issues in philosophy: what is knowledge? Though no definite answer is reached, the discussion is penetrating and wide-ranging, covering the claims of perception to be knowledge, the theory that all is in motion, and the perennially (...) tempting idea that knowledge and truth are relative to different individuals or states. The inquirers go on to explore the connection between knowledge and true judgement, and the famous threefold definition of knowledge as justified true belief. Packed with subtle arguments, the dialogue is also a work of literary genius, with an unforgettable portrait of Socrates as a midwife of wisdom. This new edition uses the acclaimed translation by John McDowell. It includes a valuable introduction that locates the work in Plato's oeuvre, and explains some of the competing interpretations of its overall meaning. The notes elucidate Plato's arguments and draw connections within the work and with other philosophical discussions. ABOUT THE SERIES: For over 100 years Oxford World's Classics has made available the widest range of literature from around the globe. Each affordable volume reflects Oxford's commitment to scholarship, providing the most accurate text plus a wealth of other valuable features, including expert introductions by leading authorities, helpful notes to clarify the text, up-to-date bibliographies for further study, and much more. (shrink)

Turnbull offers a close and detailed reading of the Parmenides, using his interpretation to illuminate Plato's major late dialogues. The picture presented of Plato's later philosophy is plausible, highly interesting, and original.

Plato's Theaetetus and Sophist are two of his most important dialogues, and are widely read and discussed by philosophers for what they reveal about his epistemology and particularly his accounts of belief and knowledge. Although they form part of a single Platonic project, these dialogues are not usually presented as a pair, as they are in this new and lively translation. Offering a high standard of accuracy and readability, the translation reveals the continuity between these dialogues and others in (...) the Platonic corpus, especially the Republic. Christopher Rowe's supporting introduction and notes help the reader to follow the arguments as they develop, explaining their structure, context and interpretation. This new edition challenges current scholarly approaches to Plato's work and will pave the way for fresh interpretations both of Theaetetus and Sophist and of Plato's writings in general. (shrink)

Replying to Theaetetus’ suggestion that knowledge is true opinion at Tht. 200e, Socrates remarks that ‘a whole profession’ testifies against this definition. The orator practises the art of persuasion, not to teach people, but make them believe whatever he wants. If a robbery has taken place, for example, he cannot in a short time teach adequately the truth about what happened to people who were not on the scene.

This article will contrast two portrayals of Protagoras: one in the "Theaetetus," where Socrates discusses Protagorean theory and even comes to his defense by imitating the deceased sophist; and another in the "Protagoras," where Socrates recounts his encounter with the sophist. I suggest that Plato wants listeners and readers of the dialogues to hear the dissonance between the two portraits and to wonder why Socrates so distorts Protagoras in the "Theaetetus." Protagoras in the "Protagoras" behaves and speaks in (...) ways that are incompatible with the Protagorean position presented in the "Theaetetus.". (shrink)

The Theaetetus is subtitled peri epistemes, on knowledge, and peirastikos, tentative. Theaetetus' three attempted definitions of knowledge, each ventured only to fail, are structured in a cascading reduction. This regress functions both negatively, as an indirect demonstration that knowledge is not definable in term of opinion or judgment, that is, knowledge is not "opinion plus," but also positively, as the ill-fated definitions build upon one another to delineate the elements necessary for a possible theory of judgment. The themes (...) of knowledge and judgment never resolve, yet, through the multiple peirastic beginnings that perish struggling to say something lasting about knowledge, this main theme ties together the dialogue's many subthemes-wisdom and character; sophistry and its relation to philosophy; Socrates' trial; intellectual midwifery, or Socratic dialectic; appearance and reality; Heracliteanism; Eleaticism; forms and participation; unity and plurality; particularity and universality; identity and difference; memory and time; relations; the relation of resemblance. One could go on. The guiding question, how to define knowledge, is a theoretical one, and the reasoning becomes progressively more abstract as the dialogue proceeds, while at the same time never straying far from practical implications: the theoretical conception of knowledge holds consequences made manifest in human action and deliberation. The dialogue about knowledge is also a dialogue about wisdom. (shrink)

In the Theaetetus, Plato looks afresh at a problem to which, he now realizes, he had earlier given an inadequate answer: the problem of the nature of knowledge. What Plato has to say on this question is of great interest and importance, not only to scholars of Plato, but also to philosophers with wholly contemporary interests. This book is a sustained philosophical analysis and critique of the Theaetetus. David Bostock provides a detailed examination of Plato's arguments and the (...) issues that they raise. He adjudicates on rival interpretations of the text, and looks at the relations between this and other works of Plato. The book does not presuppose any knowledge of Greek. (shrink)

M. J. Levett's elegant translation of Plato's _Theaetetus_, first published in 1928, is here revised by Myles Burnyeat to reflect contemporary standards of accuracy while retaining the style, imagery, and idiomatic speech for which the Levett translation is unparalleled. Bernard William’s concise introduction, aimed at undergraduate students, illuminates the powerful argument of this complex dialogue, and illustrates its connections to contemporary metaphysical and epistemological concerns.

Plato, the great philosopher of Athens, was born in 427 BCE. In early manhood an admirer of Socrates, he later founded the famous school of philosophy in the grove Academus. Much else recorded of his life is uncertain; that he left Athens for a time after Socrates' execution is probable; that later he went to Cyrene, Egypt, and Sicily is possible; that he was wealthy is likely; that he was critical of 'advanced' democracy is obvious. He lived to be 80 (...) years old. Linguistic tests including those of computer science still try to establish the order of his extant philosophical dialogues, written in splendid prose and revealing Socrates' mind fused with Plato's thought. In Laches, Charmides, and Lysis, Socrates and others discuss separate ethical conceptions. Protagoras, Ion, and Meno discuss whether righteousness can be taught. In Gorgias, Socrates is estranged from his city's thought, and his fate is impending. The Apology, Crito, Euthyphro, and the unforgettable Phaedo relate the trial and death of Socrates and propound the immortality of the soul. In the famous Symposium and Phaedrus, written when Socrates was still alive, we find the origin and meaning of love. Cratylus discusses the nature of language. The great masterpiece in ten books, the Republic, concerns righteousness. Of the six so-called dialectical dialogues Euthydemus deals with philosophy; metaphysical Parmenides is about general concepts and absolute being; Theaetetus reasons about the theory of knowledge. Of its sequels, Sophist deals with not-being; Politicus with good and bad statesmanship and governments; Philebus with what is good. The Timaeus seeks the origin of the visible universe out of abstract geometrical elements. The unfinished Critias treats of lost Atlantis. Unfinished also is Plato's last work of the twelve books of Laws, a critical discussion of principles of law which Plato thought the Greeks might accept. The Loeb Classical Library edition of Plato is in twelve volumes. (shrink)

Timothy Chappell’s new translation of the Theaetetus is presented here in short sections of text, each preceded by a summary of the argument and followed by his philosophical commentary on it. Introductory remarks discuss Plato and his works, his use of dialogue, the structure of the Theaetetus, and alternative interpretations of the work as a whole. A glossary and bibliography are provided.

Section 1 contrasts the approaches to Plato of F.M.Cornford and Gilbert Ryle, two of the early twentieth century’s leading Plato interpreters. Then I trace and evaluate attempts to discern in Plato’s Theaetetus a recognition of the role of the proposition. Section 2 focuses on the hunting of the proposition in Socrates’ Dream in the Theaetetus. Ryle, inspired by Logical Atomism, argued that Plato there anticipated an insight about the difference between names and propositions that Russell credited to Wittgenstein. (...) I rehearse difficulties for understanding the logos of the Dream as a proposition, preferring a reading of logos there as something like definition: a reading Wittgenstein also adumbrated. Section 3 examines attempts by writers such as Burnyeat and Kahn to find Plato allocating a starring role to the proposition in the argument at Theaetetus 185–6: perception, since it cannot grasp being, cannot grasp truth and hence cannot be knowledge. On their reading a grasp of being is understood as a grasp of something propositional. Problems for the propositional reading include Socrates’ talk of grasping ‘the truth of something’ (alētheia tinos), and the way the dialogue develops after 186. (shrink)

_Theaetetus_, the _Sophist_, and the _Statesman_ are a trilogy of Platonic dialogues that show Socrates formulating his conception of philosophy as he prepares the defense for his trial. Originally published together as _The Being of the Beautiful_, these translations can be read separately or as a trilogy. Each includes an introduction, extensive notes, and comprehensive commentary that examines the trilogy's motifs and relationships. "Seth Benardete is one of the very few contemporary classicists who combine the highest philological competence with a (...) subtlety and taste that approximate that of the ancients. At the same time, he as set himself the entirely modern hermeneutical task of uncovering what the ancients preferred to keep veiled, of making explicit what they indicated, and hence...of showing the naked ugliness of artificial beauty."—Stanley Rose, _Graduate Faculty Philosophy Journal_ Seth Benardete was professor of classics at New York University. He was the author or translator of many books, most recently _The Argument of the Action, Plato's "Laws," and Plato's "Symposium,"_ all published by the University of Chicago Press. (shrink)

First published in 2000. Routledge is an imprint of Taylor & Francis, an informa company.

Under what conditions would it be paradoxical to consider the possibility of false judgment? Here we claim that in the initial puzzle of Theaetetus 187e5–188c9, where Plato investigates the question of what could psychologically cause a false judgment, the paradoxical nature of this question derives from certain constraints and restrictions about causal explanation, in particular, from the metaphysical principle that opposites cannot cause opposites. Contrary to all previous interpretations, this metaphysical approach does not attribute to Plato any controversial epistemological (...) assumptions and fits better with the text and its role within the dialectic of the dialogue. (shrink)

Plato's Theaetetus investigates the nature of knowledge. Socrates converses with two mathematicians, Theaetetus and Theodorus, who cannot arrive at the necessary and sufficient conditions of knowledge. Theaetetus offers three definitions, none of which can withstand scrutiny. Most commentators on the Theaetetus examine the arguments put forward and, by constructing a definition of knowledge, attempt to complete what Plato began. But analysis of the various definitions offered is incomplete as an investigation of the dialogue. ;Before Socrates elicits (...) from Theaetetus the first definition of knowledge as perception, he characterizes himself as a midwife. And before readers are introduced to Socrates, we encounter Euclides as the alleged "author" of the dialogue. It is incumbent upon the reader to notice all the elements that Plato offers and to examine whether the dramatic setting of the arguments sheds light on their outcome. The inner frame of the dialogue reveals that the nature of Theaetetus's soul is under investigation as much as the nature of knowledge. The nature of writing and memory, discussed in the outer frame, are incorporated in the second definition of knowledge as opinion, and in the third definition as true opinion with logos. Logos is the unifying principle of the dialogue, in that Socrates' dissection of the three meanings of logos recapitulates the three definitions of knowledge. ;A rigorous reading, incorporating both the action and the speeches of the dialogue, shows that the Theaetetus exhibits the essential ingredients of knowledge. The lengthy examination of perception shows it as model for knowledge, in that an account is needed of both the knower and the known, before a complete definition is possible. Thus the Theaetetus is a guide on the way to knowledge. By the end we have a thorough understanding of both the need for a structure of soul and for the structure of that which is to be known, as well as the tool, logos, which would enable us to put the two together in a definition of knowledge. (shrink)

Socrates' dream puts in generalized form the difficulty that plato saw in the mathematician's procedure of hypothesis, I.E., Of positing undemonstrated first principles ("prota") or elements ("stoicheia") as starting-Points of demonstration. If the elements are unknown, How can what is constructed from them be known?--A difficulty to which plato had earlier called attention in the 'republic' (510cd, 533cd.) this interpretation accords with the mathematical setting and personages of the dialogue, And explains why the explicit refutation of theaetetus' third proposal, (...) That knowledge be defined as true belief accompanied by a logos, Is so perfunctory and unconvincing. Furthermore, The dilemma thus brought to light is reflected in 'posterior analytics' (book i, Chap. 3), Which was presumably written during aristotle's residence in the academy in association with plato and the other mathematicians gathered around him. (shrink)

For Plato, the crucial function of human cognition is to grasp truths. Explaining how we are able to do this is fundamental to understanding our cognitive powers. Plato addresses this topic from several different angles. In the Cratylus and Theaetetus, he attempts to identify the elemental cognitions that are the foundations of language and knowledge. He considers several candidates for this role, most notably, perception and simple meaning-bearing concepts. In the first section, we will look at Plato’s worries about (...) semantic instability and its epistemic consequences. The central role of basic cognitions in Plato’s account of knowledge in the Theaetetus will be explored in the second section. In the final section, the relevance of Plato’s conception of cognition to modern discussions in the philosophy of language and epistemology will be noted. (shrink)

Originally published in 1990. This book discusses in a philosophically responsible and illuminating way the progress of the dialogue and its separate sections to improve our understanding of Plato’s work on Theaetetus. An early coverage of this dialogue, this investigation predated a surge in study of Plato’s piece which examined Socratic and pre-Socratic thought. The author’s argument is that the _Theaetetus_ engages in re-evaluation of earlier doctrines of middle-period Platonism as well as reaffirming theories about knowledge. An important work (...) in Platonic studies and epistemology. (shrink)

Zina Giannopoulou offers a new reading of Theaetetus, Plato's most systematic examination of knowledge, alongside Apology, Socrates' speech in defence of his philosophical practice, and argues that the former text is a philosophical ...

THE OPENING OF THE THEAETETUS is curious. The report we have of another opening of nearly the same length indicates that it was always a curiosity. If both openings are Plato’s, and the rest of the dialogue they preface were not different, then Plato changed his mind about how to start off the trilogy to which the Theaetetus belongs. If the second version is spurious, someone thought he could surpass Plato and make a more sensible introduction. If ours (...) is spurious, however, then we cannot hope to interpret it. If we assume its genuineness and that it represents Plato’s only or final recension—the other one is said to be spurious and rather frigid—then the Theaetetus opens with our listening in on a recital of the conversation Socrates had with Theaetetus and Theodorus shortly before his death, while we supposedly are hearing it in Megara many years after the conversation occurred. (shrink)

Socrate's dialogue with the young student, Theaetetus, is a case of the highest form of education: a ‘divine service’ to the state of Athens, to Theaetetus' family and friends, and to Theaetetus himself. It is less a means for Socrates (or Plato) to present his theory of knowledge than a sort of ‘noble lie’ designed and intended by Socrates to keep Theaetetus both appropriately humble and hungry for wisdom. The progress of the dialogue is an allegory (...) of moral education, a picturing of what Aristotle later laid out more pedantically in the Nicomachean Ethics. (shrink)

The digression of Plato’s Theaetetus (172c2–177c2) is as celebrated as it is controversial. A particularly knotty question has been what status we should ascribe to the ideal of philosophy it presents, an ideal centered on the conception that true virtue consists in assimilating oneself as much as possible to god. For the ideal may seem difficult to reconcile with a Socratic conception of philosophy, and several scholars have accordingly suggested that it should be read as ironic and directed only (...) at the dramatic character Theodorus. When interpreted with due attention to its dramatic context, however, the digression reveals that the ideal of godlikeness, while being directed at Theodorus, is essentially Socratic. The function of the passage is to introduce a contemplative aspect of the life of philosophy into the dialogue that contrasts radically with the political-practical orientation characteristic of Protagoras, an aspect Socrates is able to isolate as such precisely because he is conversing with the mathematician Theodorus. (shrink)

The account of knowledge in Plato’s Theaetetus, as true belief meta logou, seems to lead to a regress, which may be avoided by defining one kind of knowledge as true belief that rests on a different kind of knowledge. I explore a specific version of this move: to define knowledge as true belief that results from a successful and proper exercise of a rational capacity (a dunamis meta logou).