 In the Timaeus, Plato argues that an account of the natural world can only be ‘likely’: it is an eikôs logos. Most generally speaking, the idea here is that certain explananda are such that theorizing about them can do no more than mirror their, comparatively speaking deficient, nature. This idea has ancestors in Xenophanes and Parmenides, and it plays a crucial role in the Timaeus (Bryan 2012). Academic skeptics employ various notions of the plausible and the convincing, thus developing further this tradition, albeit no longer with the assumption that different domains require different kinds of theorizing.