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The Cratylus’ main concern is to outline and evaluate the competing views of language held by two characters, Hermogenes and Cratylus, who disagree about whether convention or nature (respectively) are the source of onomastic correctness. Hermogenes has been thought to hold two radically different views by different scholars, one extreme conventionalism whereby all names are correct relative to their speakers, and another modest conventionalism according to which distinct naming actions – establishment and employment – explain why some names are correct and others are not, depending on the speaker. In this paper I argue that, though Hermogenes ultimately endorses a conventionalism of the latter kind, it is a mistake to assign him this position from the outset. Rather, to understand the structure of the conversation about conventionalism, we must view Hermogenes’ position, and Socrates’ understanding of it, as developing instead of settled. For it is only by discussing the matter that Hermogenes comes to express a moderate conventionalist view and Socrates comes to appreciate the position Hermogenes actually holds.

The ending of the Phaedo is one of the most powerful and memorable moments in the entire Platonic corpus. It is not simply the end of a single dialogue, but a depiction of the end of the life of the man (Socrates) who is a looming presence in nearly everything that Plato wrote. In this article I offer an in-depth analysis of the final scene of the Phaedo. I argue that Plato very carefully constructs the scene for the sake of specific philosophical, dramatic, and political ends. Plato uses it to unify the Phaedo as a singular text, while also provoking us to reflect on the nature of our lives, our deaths, and the possibilities and limits of philosophy itself.

In Republic VIII, oligarchy is represented as a transitional or hybrid regime combining features of aristocracy and timocracy with the rule of appetitive desire characteristic of democracy and tyranny. The apparently anomalous intermediary position of oligarchy, in which an object of appetitive soul provides the foundation for interpersonal and political norms, demonstrates the complexity of the interaction between ruling soul parts and underlying rational structures that give unity to each constitution and character type. This interaction cannot be adequately accounted for in terms of the activity of autonomous soul parts whose interactions are wholly reduced to quantitative relations of force.

The Greeks knew a virtue term that represented the ability to determine which norms deserved commitment, a virtue term usually misunderstood as “prediction of likely outcomes” or “being hesitant”: promêtheia . Plato’s uses of this term, almost completely ignored by scholarship, show a sensitivity to the prerequisites for the capacity for rational agency. We must add this virtue term to the usual suspects related to acting as a rational agent: sôphrosunê, dikaiosunê, phrônesis , and sophia . Promêtheia stands out for its importance in times of ignorance of the future.

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 ).