  From his break with Philo Antiochus was a dogmatist, who maintained that knowledge was possible and that there were truths known to him and other human beings. It is clear that he began a new school of thought and attracted followers. Later in antiquity, when different phases in the history of the Academy corresponding to changes in doctrine and philosophical approach were distinguished, some people spoke of a fourth Academy of Philo and a fifth of Antiochus (Sextus Empiricus [S.E.], Outlines of Pyrrhonism, i.e., Pyrrhoneae hypotyposes [PH] 1.220). These distinctions were not meant to correspond to changes in the Academy as an institution, and evidence about institutional developments and the relations between them and Antiochus’ change in intellectual direction is fragmentary and unclear. It is not plain, e.g., whether he began expounding his new views while still a member of the Academy or after forming a group around himself, which he dubbed the ‘Old Academy’ in order to signal his allegiance to the original Old Academy of Plato and his immediate successors and to contrast it with the ‘New Academy’ of Philo and his predecessors from the time of Arcesilaus (cf. Polito 2012) 