But though Cicero continually writes about probability, his account of what probability is supposed to be is curiously content free. Sextus Empiricus is a follower of a more extreme skeptical school and does not believe in probability, but his account of what Carneades said is much clearer. The difference is significant for the later history of probability, because Cicero was one of the best-known ancient authors, while Sextus Empiricus was almost unknown until nearly 1600.
