Is an account of hair or nails as negotiable as one of the Demiurge? It should not be. The aim of this paper is to supplement existing interpretations of Timaeus’ eikōs logos in order to provide well-grounded answers to this and similar questions. More specifically, I shall demonstrate that Timaeus’ account cannot be confined to a single epistemological field, namely that of unstable likeliness, because it exhibits a much more nuanced and graduated structure, just as do the realities it deals with, and, as a whole, leaves minimal room for refutation and scepticism.