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.

'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)

'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)

The Sophist is one of the late Dialogues of Plato. This dialogue takes place a day after Plato's Theaetetus, and aims at defining the Sophist. The participants are Socrates, who plays a minor role, the highly promising young student Theaetetus, and a Visitor from Elea, who plays the major role in the conversation.

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)

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)

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.

This book is a sustained philosophical analysis and critique of Plato's Theaetetus. Presupposing no knowledge of Greek, Bostock provides a detailed examination of Plato's arguments and the issues they raise, rival interpretations of the text, and the relations between the Theaetetus and Plato's other works.

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)

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 ...

_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)

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)

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)

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)

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)

Through the explorations of excellent scholars, this book provides a new understanding of Plato's _Theaetetus_, an absolute masterpiece which contains fundamental insights – about the nature of human cognition, perception, rationality – which are still at the centre of the contemporary debate.

This dissertation is a study of Plato's Theaetetus . I argue that the Theaetetus is fundamentally an extended reductio of a radical materialist view---the view that the only things that there are perceptible, material particulars with no properties or relations. Based on evidence from the Sophist---the sequel dialogue to the Theaetetus---I show that, according to Plato, this radical materialism results from ignoring the intelligible Forms and the participation of things in them. The radical materialist ontology also (...) implies a certain view of judgments and statements, essentially the view that judging or stating is naming or identifying the thing that is judged or stated. ;I read the discussion of the thesis that knowledge is true judgment in the second part of the Theaetetus as, first illustrating difficulties that the radical materialist view gives rise to in explaining the possibility of false judgment, but then indicating how false judgment can occur on that view, only to show that the radical materialist cannot give an account of simple arithmetical mistakes on his assumptions. ;The third part of Theaetetus, dealing with the thesis that knowledge is true judgment with an account, concentrates on the implications of radical materialism for the unity and complexity of objects; the radical materialist cannot give an account of how there can be a whole with parts. He also cannot explain the possibility of systematic knowledge and expertise in a field, such as arithmetic or grammar, because of his commitment to the particularity of what there is, and therefore, of what is known. (shrink)

Scholars who have taken interest in Theaetetus' educational theme argue that Plato contrasts an inferior, even dangerous, sophistic education to a superior, philosophical, Socratic education. I explore the contrasting exhortations, methods, ideals and epistemological foundations of Socratic and Protagorean education and suggest that Socrates' treatment of Protagoras as educator is far less dismissive than others claim. Indeed, Plato, in Theaetetus, offers a qualified defence of both Socrates and Protagoras. Socrates and Protagoras each dwell in the middle ground between (...) the extremes presented in the dialogue's digression, which contrasts the life of the philosopher and the life of the courtroom orator. Both Socrates and Protagoras demonstrate a serious engagement with both politics and philosophy. Theodorus presents an educational option in which theory is divorced from politics while an ignoble sophistic education is presented as political but divorced from theory. Protagorean education, in Theaetetus, emerges as superior to a base sophistic education, though it remains inferior to Socratic education. (shrink)

Plato, as a poet, employs muthos extensively to express his philosophical dialectical development, so the majority of his dialogues are comprised of muthoi. We cannot separate his muthos from his philosophical thought, since the former has great influence in the latter. So the methodology of this paper is first to discuss the dialogue "Theaetetus" to find out why he compares Socrates to the Greek goddess Artemis; then his concept of Maieutikē will be investigated. At the beginning of Plato’s " (...) class='Hi'>Theaetetus", Socrates first likens himself to the goddess Artemis, who, though unmarried, has a duty to assist women in labour. Socrates’ role, as Plato portrays, is the same as that of Artemis; and the technē he possesses is Maieutikē, which is to assist his students in giving birth to their mental offspring. This paper will focus on discussion on the Socratic mythological role in Platonic interpretation and dialectics so as to reveal the philosophical meaning of Socratic ignorance. (shrink)

The Theaetetus is one of the most widely studied of any of the Platonic dialogues because its dominant theme concerns the significant philosophical question, what is knowledge? In this book Paul Stern provides a full-length treatment of its political character in relationship to this dominant theme. He argues that this approach sheds significant light on the distinctiveness of the Socratic way of life, with respect to both its initial justification and its ultimate character. More specifically, he argues that Socrates' (...) revolutionary decision to subject political life to philosophic reflection, the decision that leads directly to his trial and execution, is based on his awareness of the elusiveness of comprehensive knowledge and the implications of that elusiveness for the validity of philosophic inquiry. This view of Socrates' rationale has important consequences for our understanding of political philosophy and of the validity of the life of reason itself. (shrink)

Unlike most readings of Plato’s Theaetetus, which concentrate on gnoseology, this paper places it in the debate on commensurable and incommensurable magnitudes that distinguished Greek philosophical and mathematical thought at the beginning of the 4th century BC and in which Theaetetus played a leading role. The argumentation of the dialogue shows clearly how this debate was important for Plato, to the point that the entire dialogue can be considered as an attempt to consider seriously how incommensurability, and its (...) ontological correlate, the concept of dynamis, could elaborate a new form of logos. (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).

In this paper, I examine several key issues relating to the definition of knowledge as perception in the first part of Plato's Theaetetus. I begin by explaining the workings of the ‘secret doctrine’ of perception, which is introduced in order to support the idea that perception is incorrigible, and then turn to examine the two refutations of the definition of knowledge as perception which appear at the end of the first part of the Theaetetus. I shall present (...) and explain distinct lines of interpretation pertaining to these passages and explore the consequences they attempt to draw regarding Plato's views on the perceptual world, the nature of perception and how these bear on his conception of knowledge. (shrink)

This book is a tour de force in the Oxford tradition of philosophical commentaries. Bostok's interest is not primarily the drama, characters, or setting of the Theaetetus, but the interpretation and evaluation of the arguments presented therein. Consequently, the dialogue receives a rather different treatment than the one to be found in Seth Benardete's The Being of the Beautiful, which is not mentioned by Bostok. Bostok's analysis of the Theaetetus is set against a background of ancient, modern, and (...) contemporary epistemology. For historical context Bostok draws mostly on the other works of Plato, though he also discusses the views of Protagoras and Heraclitus concerning perception and flux, respectively. The tradition in epistemology against which the Theaetetus is subsequently measured begins with the British empiricists Locke, Berkeley, and Hume, and includes twentieth-century analytic philosophers like Russell, Quine, and Kripke. Bostok's style is remarkably clear and engaging, and his account of the significance of the Theaetetus, while restricted in scope, is penetrating and masterly. The book contains a very brief preface, an ample introductory chapter on the place of the Theaetetus in Plato's philosophy, two main sections--appropriately titled "Knowledge and Perception" and "Knowledge and Belief"--and a modest bibliography and index. (shrink)

Plato's Theaetetus is an acknowledged masterpiece, and among the most influential texts in the history of epistemology. Since antiquity it has been debated whether this dialogue was written by Plato to support his familiar metaphysical doctrines, or represents a self-distancing from these. David Sedley's book offers a via media, founded on a radical separation of the author, Plato, from his main speaker, Socrates. The dialogue, it is argued, is addressed to readers familiar with Plato's mature doctrines, and (...) sets out to show how these doctrines, far from being an abandonment of his Socratic heritage, are its natural outcome. The Socrates portrayed here is the same Socrates as already portrayed in Plato's early dialogues. While not a Platonist, he is exhibited - to put it in terms of an image made famous by this dialogue - as having been Platonism's midwife. In a comprehensive rereading of the text, Sedley tracks the ways in which Socrates is shown unwittingly preparing the ground for Plato's mature doctrines, and reinterprets the dialogue's individual arguments from this perspective. The book is addressed to all readers interested in Plato, and does not require knowledge of Greek. (shrink)

In this paper I argue that in the digression in Plato’s Theaetetus godlikeness may be construed as Socrates’ ethical achievement, part and parcel of his art of mental mid­wifery. Although the philosophical life of contemplation and detachment from earthly affairs exemplifies the human ideal of godlikeness, Socrates’ godlikeness is an inferior but legitimate species of the genus. This is the case because Socratic godlikeness abides by the two requirements for godlikeness that Socrates sets forth in the digression: first, it (...) is a kind of escape from the phenomenal world; and second, it allows Socrates to become just and pious with wisdom. The crucial difference between Socrates and the philosopher that prevents the former from being as godlike as the latter is his epistemic barrenness, on account of which he cannot define the constitutive virtues of godlikeness, i.e., justice, piety, and wisdom. As a barren midwife of the intellect, Socrates practices godlikeness but does not have a philosophical understanding of its nature. Nevertheless, by extolling the life of the philosopher he urges others to aspire to what he can never attain, philosophical godlikeness. (shrink)

In this paper I argue that in the digression in Plato’s Theaetetus godlikeness may be construed as Socrates’ ethical achievement, part and parcel of his art of mental mid­wifery. Although the philosophical life of contemplation and detachment from earthly affairs exemplifies the human ideal of godlikeness, Socrates’ godlikeness is an inferior but legitimate species of the genus. This is the case because Socratic godlikeness abides by the two requirements for godlikeness that Socrates sets forth in the digression: first, it (...) is a kind of escape from the phenomenal world; and second, it allows Socrates to become just and pious with wisdom. The crucial difference between Socrates and the philosopher that prevents the former from being as godlike as the latter is his epistemic barrenness, on account of which he cannot define the constitutive virtues of godlikeness, i.e., justice, piety, and wisdom. As a barren midwife of the intellect, Socrates practices godlikeness but does not have a philosophical understanding of its nature. Nevertheless, by extolling the life of the philosopher he urges others to aspire to what he can never attain, philosophical godlikeness. (shrink)

We examine the "Theaetetus" in the light of its juxtaposition of philosophical, mathematical and sophistical approaches to knowledge, which we show to be a prominent feature of the drama. We suggest that clarifying the nature of philosophy supersedes the question of knowledge as the main ambition of the "Theaetetus". Socrates shows Theaetetus that philosophy is not a demonstrative science, like geometry, but it is also not mere word-play, like sophistry. The nature of philosophy is revealed in Socrates' (...) activity of examination and his refusal to deny his ignorance about knowledge. (shrink)

"theaetetus" of the thesis that knowledge is sense-perception. After a brief defence of plato's handling of this thesis it is shown how the argument can, by the addition of one premiss, be rendered valid. A strong form of the 'proper objects' doctrine of perception is revealed as a crucial premiss. An implication of the argument is seen to be that perception in itself is unable to found an ordered and coherent picture of the world. A similar point, it (...) is argued, lies behind certain passages in the central books of the "republic". A tentative conclusion is that in the "theaetetus" plato retains and indeed sharpens the views about the sensible world which he expresses in the "republic". (shrink)