Book, Paragraph

 1      I, 13|    another; consequently their opposites also, "it is possible to
 2      I, 46|   through not apprehending the opposites rightly, one of which must
 3     II, 15|       negative. Of the genuine opposites I call those which are universal
 4     II, 15|       must be affirmative, but opposites are, the one affirmative,
 5     II, 15|  syllogism is possible because opposites affirm and deny the same
 6     II, 15|    that it is possible to take opposites in the way we said, viz. "
 7     II, 22|  belong to all B.~When, of two opposites A and B, A is preferable
 8     II, 22|       aversion, since they are opposites: and C is similarly related
 9     II, 22|      to D, since they also are opposites. If then A is an object
10     II, 26| opposition to the premiss, and opposites can be proved only in the
11     II, 26|   objection may be either that opposites are never subjects of a
12     II, 26|    science, and contraries are opposites, so that we get the first
13     II, 26|       we reply either that all opposites or that certain contraries,
14     II, 26|        a single science of all opposites. Thus we must have the first