ABSTRACT: The Stoics held that the wise person does not err. This thesis was widely criticized in the ancient world and runs afoul of contemporary fallibilist views in epistemology. Was this view itself an error? On one line, the view can be modified to accommodate many of the critical lines against it. Some of these lines of modification are consistent with traditional Stoic value theory (for example, importing the notion of preferred indifferents into epistemic considerations). However, others require larger modifications to Stoic axiology (in particular, a revision of the equality of errors thesis). A version of the no errors thesis emerges as defensible against the criticisms of the view, but there is then the question as to whether it is an orthodox Stoicism.