Forke Chinese sophists, 1901, note p. 10

Yin Wên Tse distinguished three categories of words, or, properly speaking, of attributes :
(1) words describing things, such as square and round, white and black ;
(2) words approving or disapproving, e. g. good and bad, noble and mean,
(3) comparative words, e. g. wise and stupid, to love and to hate.

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