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)

Protagoras believes that all beliefs are true. Since Protagoras' belief that all beliefs are true is itself a belief, it follows from Protagoras' belief that all beliefs are true that Protagoras' belief is true. But what about the belief that Protagoras' belief is false? Doesn't it follow, by parallel reasoning and not at all trivially, that if all beliefs are true and there is a belief that Protagoras' belief is false, then Protagoras' belief is false?

In thesophist (263e10–264b4), Plato distinguishes between two kinds of belief. On the one hand, there is a kind of belief that occurs “according to thinking” (κατὰ διάνοιαν), being “the completion of thinking” (διανοίας ἀποτελεύτησις). This kind is called ‘doxa.’ On the other hand, there is another kind of belief that occurs “through sense perception” (δι᾽ αἰσθήσεως). This kind is called ‘phantasia,’ perhaps best rendered as “appearing.”1 The purpose of this paper is to uncover the distinction between these two different kinds (...) of belief.2 What distinguishes these two kinds of belief is the believer’s understanding of the thing the belief is about, as a result of the way in which each kind of belief is .. (shrink)

Two readings of the much-discussed περιτροπή argument of "Theaetetus" 170c-171c have dominated the literature. One I call "the relativity reading". On this reading, the argument fails by ignoratio elenchi because it "carelessly" omits "the qualifications 'true for so-and-so' which [Protagoras'] theory insists on" (Bostock 1988: 90). The other reading I call "the many-worlds interpretation". On this view, Plato's argument succeeds in showing that "Protagoras' position becomes utterly self-contradictory" because "he claims that everyone lives in his own relativistic world, yet at (...) the same time he is forced by that very claim to admit that no one does" (Burnyeat 1976b: 48). I discuss and criticise both readings, and present a third, according to which the point of the argument is, very roughly, that Protagoras is committed to equating truth and truth-for, and so, further, to their intersubstitutability. This further commitment proves fatal to his argument. (shrink)

This paper studies an argument in the prologue of the Charmides which defends the view that it is impossible to cure the body independently of the soul. I argue that Socrates is committed to an account of the psychē as an embodied soul, causally responsible for the biological condition of the body. Furthermore, the prescription of kaloi logoi as a treatment for the soul’s biological failures suggests that Socrates appears to initially regard the ethical and biological dimensions of the soul (...) as intimately connected. But I also show that Socrates is unable to maintain this position consistently throughout the passage. A similar conflation of functions can be traced in R. X.608d–611a. (shrink)