Published online by Cambridge University Press: 14 March 2022
Probability and Frequency. Aristotle frequently used the concept of probability, but apparently he did not make any persistent effort to clarify or analyze it. His description of a fortiori argument in The Topics (115a, 6–14), e.g., depends upon “the more or less likely or probable,” but he does not explore this notion. In The Rhetoric, where he applies himself to a puzzle about probability which the Sophists had advanced (1402a, 5–30), he comes closer to an analysis of probability. Aristotle quotes Agathon,
One might perchance say this was probable—
That things improbable oft will hap to men,
I have dealt with these topics previously in my article “The Enthymeme: Crossroads of Logic, Rhetoric, and Metaphysics,” The Philosophical Review, Vol. LXI, 1952, pp. 368–76. I am indebted for several points in this paper to the late Professor Ralph M. Blake.