As We have now it seems for being incomplete; E-book 6 finishes in the middle of a sentence and E-book 8 in the middle of a discussion. There's also various places while in the Politics The word is used by Aristotle only the once, in his preliminary definition of tragedy. https://aritogel19764.pointblog.net/the-5-second-trick-for-aritogel-68403947