The examples dealt with so far are examples of simple, complete sayables or propositions. The Stoics also developed an account of non-simple propositions. This interest in non-simple propositions and their logical relations was shared with philosophers in the Megarian or Dialectical school. It set the philosophers of the Hellenistic period on the pathway to surpass Aristotle’s progress in logic. His logic was ‘a logic of terms’. To put the matter very briefly and far too crudely, Aristotle had d