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Index for PRIOR ANALYTICS Book 2 Part 22

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Paragraph 1 Whenever the extremes are convertible it is necessary that the middle should be convertible with both.
Paragraph 2 When, of two opposites A and B, A is preferable to B, and similarly D is preferable to C, then if A and C together are preferable to B and D together, A must be preferable to D.


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