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| 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. |