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It is an evident corollary of these conclusions that if the same attribute A inheres in two terms C and D predicable either not at all, or not of all instances, of one another, it does not always belong to them in virtue of a common middle term. |
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It is also clear that when A inheres in B, this can be demonstrated if there is a middle term. |
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When we are to prove a conclusion, we must take a primary essential predicate-suppose it C-of the subject B, and then suppose A similarly predicable of C. |
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(2) If we have to show that E is not D by means of the premisses, all D is C; |
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(3) In the third figure the middle will never fall beyond the limits of the subject and the attribute denied of it. |
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created 94/10/29 modified 1998/9/3