Sextus Empiricus was a Greek Pyrrhonist philosopher and Empiric school physician with Roman citizenship. His philosophical works are the most complete surviving account of ancient Greek and Roman Pyrrhonism, and because of the arguments they contain against the other Hellenistic philosophies, they are also a major source of information about those philosophies. c. 200 – c. 300; died at about 100. Alive at the same time as Constantine the Great, Ambrose, Diophantus of Alexandria, Ausonius, and Plotinus. Wiki link