Aristotle - The Organon - index for ANALYTICA PRIORIA Book 2 Part 26


Paragraph 1 An objection is a premiss contrary to a premiss.
Paragraph 2 Similarly if the premiss objected to is negative.
Paragraph 3 In general if a man urges a universal objection he must frame his contradiction with reference to the universal of the terms taken by his opponent, e.g. if a man maintains that contraries are not subjects of the same science, his opponent must reply that there is a single science of all opposites.
Paragraph 4 If the objection is particular, the objector must frame his contradiction with reference to a term relatively to which the subject of his opponent's premiss is universal, e.g. he will point out that the knowable and the unknowable are not subjects of the same science:
Paragraph 5 Besides, an objection in the middle figure would require a fuller argument, e.g. if it should not be granted that A belongs to B, because C does not follow B.
Paragraph 6 We must consider later the other kinds of objection, namely the objection from contraries, from similars, and from common opinion, and inquire whether a particular objection cannot be elicited from the first figure or a negative objection from the second.

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