セクストス(2世紀）Outlines of Pyrrhonism 単なる編集者にあらず 独創性あり
The chief source for ancient Pyrrhonism is the work of the Greek physician Sextus Empiricus (second century c.e.), including Outlines of Pyrrhonism, Against the Dogmatists, and Against the Mathematicians.Once thought of as a mere compiler, many recent studies have found philosophical originality in his texts.
As Sextus explained it, skepticism was not a philosophy but rather a way of life in which one opposed all claims to truth with equal opposite claims (equipollence).
Standard tropes or formula arguments could be used against any certainty or truth. He attributed one set of these tropes to the Greek philosopher Aenesidemus and another to Agrippa (both first century b.c.e.). Diogenes Laertius's Lives of the Philosophers (early third century c.e.) is also a source for information about ancient skepticism, including the tropes.