Full Idea
A demonstration is a deduction which proceeds from necessities.
Gist of Idea
A demonstration is a deduction which proceeds from necessities
Source
Aristotle (Posterior Analytics [c.327 BCE], 73a24)
Book Reference
Aristotle: 'Posterior Analytics (2nd ed)', ed/tr. Barnes,Jonathan [OUP 1993], p.6
A Reaction
Elsewhere he tells us that demonstration that brings understanding (Idea 12365), so this is an interesting gloss. He says that the middle term of the syllogism gives the understanding, but necessities reside in the whole propositions of the premisses.
Related Idea
Idea 12365 We can know by demonstration, which is a scientific deduction leading to understanding [Aristotle]