Is Yablo's paradox non-circular?

As is often the case in philosophy, challenges breed challenges. The latestchallenge comes from Roy Sorensen (1998), who has defended Yablo’sclaim of non-circularity in the face of Priest’s objection. Evidently,Sorensen’s defence has been thought by many to be successful; there hasbeen little discussion, and no challenges, thereafter. In this paper I breakthe silence. My aim is to show that Sorensen’s defence fails to addressPriest’s basic point; none of Sorensen’s replies provides any reason forthinking that, contrary to Priest’s challenge, Yablo’s paradox is non-circular.To make matters clear I shall present a new version of Priest’s argument,a version which, I hope, expresses Priest’s basic point in a clearer way than