Contingency in the 2nd Figure (A17–19)

  • Adriane Rini
Part of the The New Synthese Historical Library book series (SYNL, volume 68)


When we turn to consider An.Pr. A17 where Aristotle discusses Q+Qs in the second figure, we find something very different right at the start. There are not any valid second figure Q+Q syllogisms.


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  1. Patterson, R. 1995, Aristotle’s Modal Logic. Essence and Entailment in the Organon. Cambridge: Cambridge University Press.Google Scholar
  2. Thom, P. 1996, The Logic of Essentialism. An Interpretation of Aristotle’s Modal Syllogistic. Dordrecht: Kluwer.Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Massey University, Philosophy - HPCPalmerston NorthNew Zealand

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