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Aristotle - index for METAPHYSICS Book 5 Part 14

Quality

  
Paragraph 1 'Quality' means (1) the differentia of the essence, e.g. man is an animal of a certain quality because he is two-footed, and the horse is so because it is four-footed;
Paragraph 2 (3) All the modifications of substances that move (e.g. heat and cold, whiteness and blackness, heaviness and lightness, and the others of the sort) in virtue of which, when they change, bodies are said to alter.
Paragraph 3 Quality, then, seems to have practically two meanings, and one of these is the more proper.


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