In Logic, the Stoic system is noteworthy for their theory as to the test of truth, the Criterion. They compared the new-born soul to a sheet of paper ready for writing. Upon this the senses write their impressions, fantasias and by experience of a number of these the soul unconsciously conceives general notions koinai eunoiai or anticipations. prolhyeis When the impression was such as to be irresistible it was called (katalnptikh fantasia) one that holds fast, or as they explained it, one… Marcus Aurelius, Meditations, pg. 6, loc. 585. Kindle Edition