单词 | universal affirmative |
释义 | > as lemmasuniversal affirmative universal affirmative n. Logic a proposition of the form ‘all X is Y’; cf. sense A. 6b, universal negative n.Symbol A: see A n. 6. ΚΠ 1551 T. Wilson Rule of Reason Gvijv In Celarent we se twise E, whereby we are taught that the argument (if we make it in this mode) must haue two vniuersall negatiues, and one vniuersal affirmatiue, by reason of A. 1628 T. Spencer Art of Logick 177 The first, is an vniversall affirmatiue. The third, is a particular negatiue. 1788 H. H. Kames Sketches Hist. Man III. 354 When the quantity is diminished, as in the universal affirmative, it is called conversion per accidens. 1832 C. Wesley Guide Syllogism 9 There are four kinds of pure categorical propositions, distinguished by the symbols, A, E, I, O. Universal affirmative, A. Universal negative, E. [etc.]. 1906 C. E. Hooper Anat. Knowl. i. xiii. 49 The Universal Affirmative takes usually one or other of the following shapes:—All X's are Y (e.g., All men are subject to sorrow); [etc.]. 2003 Synthese 134 455 Consider next universal affirmatives with negative subjects, All non-S are P. < as lemmas |
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