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Books Books 1 - 1 of 1 on Moreover, the negative words not, no, &c., have two kinds of meaning which must be....
" Moreover, the negative words not, no, &c., have two kinds of meaning which must be carefully distinguished. Sometimes they deny, and nothing more : sometimes they are used to affirm the direct contrary. In cases which offer but two alternatives, one of... "
First notions of logic, preparatory to the study of geometry - Page 5
by Augustus De Morgan - 1840 - 32 pages
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Elementary notions of logic, designed as prolegomena to the study of geometry

Alfred Milnes - 1880
...following exposition of the subject by Professor De Morgan : — "The negative words ' not,' ' no,' etc., have two kinds of meaning, which must be carefully...tall, or considerably under the average. But it must be remembered that in all logical reasoning the negation is simply negation, and nothing more, never...
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