Aristotle'S natural deduction reconsidered

History and Philosophy of Logic 18 (1):1-15 (1997)
John Corcoran?s natural deduction system for Aristotle?s syllogistic is reconsidered.Though Corcoran is no doubt right in interpreting Aristotle as viewing syllogisms as arguments and in rejecting Lukasiewicz?s treatment in terms of conditional sentences, it is argued that Corcoran is wrong in thinking that the only alternative is to construe Barbara and Celarent as deduction rules in a natural deduction system.An alternative is presented that is technically more elegant and equally compatible with the texts.The abstract role assigned by tradition and Lukasiewicz to Barbara and Celarent is retained.The two ? perfect syllogisms? serve as ?basic elements? in the construction of an inductively defined set of valid syllogisms.The proposal departs from Lukasiewicz, and follows Corcoran, however, in construing the construction as one in natural deduction.The result is a sequent system with fewer rules and in which Barbara and Celarent serve as basic deductions.To compare the theory to Corcoran?s, his original is reformulated in current terms and generalized.It is shown to be equivalent to the proposed sequent system, and several variations are discussed.For all systems mentioned, a method of Henkin?style completeness proofs is given that is more direct and intuitive than Corcoran?s original
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DOI 10.1080/01445349708837269
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References found in this work BETA
Completeness of an Ancient Logic.John Corcoran - 1972 - Journal of Symbolic Logic 37 (4):696-702.
What is a Syllogism?T. J. Smiley - 1973 - Journal of Philosophical Logic 2 (1):136 - 154.
Syllogism and Quantification.Timothy Smiley - 1962 - Journal of Symbolic Logic 27 (1):58-72.

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Citations of this work BETA
Aristotle's Syllogistic and Core Logic.Neil Tennant - 2014 - History and Philosophy of Logic 35 (2):120-147.
Logics for the Relational Syllogistic.Ian Pratt-hartmann & Lawrence S. Moss - 2009 - Review of Symbolic Logic 2 (4):647-683.
Proclus and the Neoplatonic Syllogistic.John N. Martin - 2001 - Journal of Philosophical Logic 30 (3):187-240.
Distributive Terms, Truth, and thePort Royal Logic.John N. Martin - 2013 - History and Philosophy of Logic 34 (2):133-154.
An Intensional Leibniz Semantics for Aristotelian Logic.Klaus Glashoff - 2010 - Review of Symbolic Logic 3 (2):262-272.

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