There is the inevitable origin in Aristotle. Perhaps the most read of all Aristotle’s works was the Nicomachean Ethics, and consequently the remarks about probability in the introduction are the most quoted and influential opinions on the subject, without exception: Our discussion will be adequate if it has as much clearness as the subject-matter admits of; for precision is not to be sought for alike in all discussions, any more than in all the products of the crafts.

