 Earlier empiricists, argues Galen, viewed perception and experience as both the activity of seeing for oneself (autopsia) and as cognition, and that is how he thought medical practice ought to be conducted (GAL1: 25–26). Here we have Galen the physician and the philosopher who wrote: “The best doctor is also a philosopher” (GAL2: 30–34), and the Galen who was to be a predecessor of Sanches. But Galen was not alone in being a philosopher and a physician. His contemporary Sextus Empiricus seems also to have been both.