| 单词 | negation sign |
| 释义 | > as lemmasnegation sign negation sign n. Logic a sign or symbol used to indicate negation. ΘΚΠ society > computing and information technology > [noun] > logic > operation > particular operations > sign negation sign1938 1938 Jrnl. Symbolic Logic 13 79 (note) M is any ‘affirmative’ modal, that is, any modal with an even number of negation signs. 1948 J. C. C. McKinsey & A. Tarski in Jrnl. Symbolic Logic 13 1 As regards constants, they are three in number: the negation sign, the conjunction sign, and the possibility sign. 1955 A. N. Prior Formal Logic iii. ii. 253 We regard..his negation-sign as meaning impossibility. 1995 Jrnl. Philos. 92 641 A form in which all negation signs are prefixed to atomic formulas. < as lemmas |
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