Quotes from book
Posterior Analytics

Name: Posterior Analytics
Author: Aristotle

Aristotle Original title Ἀναλυτικὰ ὕστερα

The Posterior Analytics is a text from Aristotle's Organon that deals with demonstration, definition, and scientific knowledge. The demonstration is distinguished as a syllogism productive of scientific knowledge, while the definition marked as the statement of a thing's nature, ... a statement of the meaning of the name, or of an equivalent nominal formula.

“Knowledge of the fact differs from knowledge of the reason for the fact.”

Aristotle book Posterior Analytics

I. 13, 78a.22
Posterior Analytics

“The premisses of demonstrative knowledge must be true, primary, immediate, more knowable than and prior to the conclusion, which is further related to them as effect to cause… The premisses must be the cause of the conclusion, more knowable than it, and prior to it; its causes, since we posses scientific knowledge of a thing only when we know its cause; prior, in order to be causes; antecedently known, this antecedent knowledge being not our mere understanding of the meaning, but knowledge of the fact as well. Now 'prior' and 'more knowable' are ambiguous terms, for there is a difference between what is prior and more knowable in the order of being and what is prior and knowable to man. I mean that objects nearer to sense are prior and more knowable to man; objects without qualification prior and more knowable are those further from sense. Now the most universal causes are furthest from sense and particular causes are nearest to sense, and they are thus exactly opposed to each other.”

Aristotle book Posterior Analytics

I. 2, 71b.9 sqq
Posterior Analytics

“We may assume the superiority ceteris paribus [all things being equal] of the demonstration which derives from fewer postulates or hypotheses—in short from fewer premisses; for… given that all these are equally well known, where they are fewer knowledge will be more speedily acquired, and that is a desideratum. The argument implied in our contention that demonstration from fewer assumptions is superior may be set out in universal form…”

Aristotle book Posterior Analytics

Book I, Part 25
Also known as Occam's razor or the principle of parsimony / economy (lex parsimoniae)
Richard McKeon (tr.) (1963), p. 150
Posterior Analytics