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An Iconoclastic Interpretation of Hypotheses in the Posterior Analytics

  • Christopher M. Lutz EMAIL logo
Published/Copyright: November 10, 2025
Apeiron
From the journal Apeiron

Abstract

In the Posterior Analytics, there are at least three types of first principle from which the demonstrative sciences proceed: axioms, definitions, and hypotheses. Of these, it is perhaps most difficult to pin down what Aristotle means by a hypothesis (ὑπόθεσις). Traditionally, hypotheses have been understood as distinct existence claims (‘S exists’), yet this interpretation has significant problems, partly resulting from Aristotle’s seemingly contradictory characterizations of hypotheses (characterizations written off as ‘nontechnical’ by traditionalists). Despite these problems, however, the traditional interpretation has persisted, as its challengers have struggled to offer a compelling alternative. This paper argues for an interpretation of hypotheses that centers on their interplay with definitions. On my view, both definitions and hypotheses are predicative propositions (‘P belongs to S’) serving as premises in demonstrative syllogisms. They are distinct insofar as in definitions the predicate (a definiens) inheres in the ‘what it is’ of the subject, whereas in hypotheses the subject inheres in the ‘what it is’ of the predicate (an in-virtue-of-itself accident of that subject). Together, definitions and hypotheses bring about a demonstrative conclusion that very much resembles the hypothesis. This interpretation, while admittedly iconoclastic, is more consistent than the traditional one with more of what Aristotle has to say about hypotheses throughout the Posterior Analytics.


Corresponding author: Christopher M. Lutz, Philosophy, Duquesne University, Pittsburgh, USA, E-mail:

Acknowledgements

For their generous help with various parts of this paper, I would like to thank Ron Polansky, Emily Katz, Kelly Arenson, Molly Wallace, Dan Cook, Jeremiah Noonan, John Henry Reilly, the past and present members of the Ancient Greek Reading Group at Duquesne University, and two anonymous referees. Any and all mistakes are my own.

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Received: 2024-11-02
Accepted: 2025-09-27
Published Online: 2025-11-10

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