Sextus Empiricus is the only Pyrhonnean Skeptic whose writings have survived. He was trained as a medical doctor and teacher, and he became the last leader of the Pyrrhonean movement. His written works provide an overview of the arguments worked out by previous Skeptics. Against the Mathematicians and Against the Dogmatists contain detailed arguments against the claim to knowledge in the liberal arts (such as grammar, geometry, astronomy, and music) as well as in philosophy. Ironically, these works are two important sources of knowledge about the early history of astronomy, geometry, grammar, and Stoic
theology.
