Aristotle - The Organon - index for ANALYTICA POSTERIORA Book 2 Part 3

How essential nature is revealed

Paragraph 1 It is clear, then, that all questions are a search for a 'middle'.
Paragraph 2 Induction too will sufficiently convince us of this difference;
Paragraph 3 It is evident, then, that not everything demonstrable can be defined.
Paragraph 4 Moreover, the basic premisses of demonstrations are definitions, and it has already been shown that these will be found indemonstrable;
Paragraph 5 But if the definable and the demonstrable are not wholly the same, may they yet be partially the same?
Paragraph 6 So it emerges that not all the definable is demonstrable nor all the demonstrable definable;

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