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Aristotle - The Organon - index for ANALYTICA PRIORIA Book 1 Part 9

Syllogisms with some necessary premisses

  
Paragraph 1 It happens sometimes also that when one premiss is necessary the conclusion is necessary, not however when either premiss is necessary, but only when the major is, e.g. if A is taken as necessarily belonging or not belonging to B, but B is taken as simply belonging to C:
Paragraph 2 In particular syllogisms, if the universal premiss is necessary, then the conclusion will be necessary;


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