Aside from overcoming the Fallacy of Four Terms, what were the major contributions of Stoic syllogisms? What did they provide that Aristotelian syllogisms could not? And, what were their major limitations?

  • I don't know about syllogisms - but they developed modal logic more fully Jun 20, 2014 at 17:39

1 Answer 1


One of the limitations of the Stoics is that they did not "grasp as clearly as Aristotle the formal nature of invalidity." Ian Mueller pointed this out in a famous article on Stoic Logic. His argument was that they merely provided a framework to settle inferential validity and reveal those questions that fall outside logic (such as soundness questions related to metaphysics implied by the premises).

  • Could you at least cite the article? Jun 20, 2014 at 13:13
  • 1
    Ian Mueller. "An Introduction to Stoic Logic." in John M. Rist (ed.). "The Stoics." University of California Press, 1978.
    – user155194
    Jun 20, 2014 at 13:37

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