Abstract
In a familiar passage from Plato's Euthyphro, Socrates points to a contrast between "matters of difference that cause hatred and anger," and matters where agreement is reached by seemingly rational means. Where a dispute concerns number, size or weight, we arrive at a decision by counting or measuring. But there are matters of disagreement where such convergence is not to be expected: "the just and the unjust, the beautiful and the ugly, the good and the bad" notorious among them. Socrates's point, in drawing what a modern reader might take to be a contrast between facts and values, is not so easily understood. The Euthyphro passage elicits a concern-call it a concern about "objectivity"-which is often addressed in a characteristically narrow way. How we approach a given concern depends on how we articulate that concern, and this is what I propose to consider here.