The Classical Quarterly (New Series)

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* The research on which this article is based was supported by the Wellcome Trust. I am grateful to Philip van der Eijk, Richard Sorabji, Peter Adamson, Hynek Bartoš and Malcolm Heath for their comments on earlier versions of this paper, and to David Charles, Pierre Destrée and Gábor Betegh for discussing this subject with me at an early stage.