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Aristotle - The Organon - index for ANALYTICA PRIORIA Book 1 Part 10

The second figure with one necessary premiss

  
Paragraph 1 In the second figure, if the negative premiss is necessary, then the conclusion will be necessary, but if the affirmative, not necessary.
Paragraph 2 But if the affirmative premiss is necessary, the conclusion will not be necessary.
Paragraph 3 Similar results will obtain also in particular syllogisms.


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