Prior Analytics 1.23; an elimination theorem to avail the scientist and the dialectician alike
Doukas Kapantais

October 25, 2023, 4:00pm - 6:00pm
Research Centre for Greek Philosophy, Academy of Athens

Elli Lambridis Philosophical Library
9 Hypsilantou
Athens 10675

This event is available both online and in-person


University of Vienna

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The Research Centre for Greek Philosophy at the Academy of Athens invites you to the first meeting of the Monthly Philosophy Seminar for the academic year 2023-2024 which will take place on Wednesday 25 October 2023, 16:00-18:00 (ATH, GR timezone) at the Elli Lambridis Philosophical Library (9 Hypsilantou str., Athens).

Speaker: Doukas Kapantais, Research Director at the RCGPh, Academy of Athens

Topic: Prior Analytics 1.23; an elimination theorem to avail the scientist and the dialectician alike.

Those interested may attend either in person or via Zoom at the following link:

Meeting ID: 914 746 4241

Passcode: 621567


I apprehend the Prior Analytics not as a treatise about a single “formal” theory but as a treatise on the deductive interplay between two such theories: (i) what Corcoran, Smiley and others have identified as the Syllogistic, and (ii) the fourteen syllogisms of the scholastics. The metatheory exploring their properties and deductive interaction is a contentual theory containing (primarily) the dicta, a pretheoretical reductio ad impossibile rule, and the square of opposition. The above interplay–I claim–culminates in the construction of the algorithmic apparatus in 1.28 aimed at availing both scientists and dialecticians. I take stock of some puzzling claims by Aristotle according to which whatever can be proved by reductio ad impossibile can also be proved ostensively. I argue that apprehending the content of the Prior Analytics that way vindicates these claims.

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