“All men are mortal. Socrates was mortal. Therefore, all men are Socrates.”
“Logic is usually understood nowadays as a study of certain formal systems, though in former times there were philosophers who held that the subject matter of logic was the formal rules of human thought.”
“Logic is neither a science nor an art, but a dodge.”
“It might ... have been supposed that logicians and psychologists would have devoted special attention to meaning, since it is so vital for all the issues with which they are concerned. But that this is not the case will be evident[1] to anyone who studies the Symposium in Mind (October 1920 and following numbers) on "The Meaning of 'Meaning.'"”
“When emotion brings us ghosts from the past, only logic can root us in the present.”
“[ Fuzzy logic is ] a logic whose distinguishing features are (i) fuzzy truth-values expressed in linguistic terms, e.g., true, very true, more or less true, or somewhat true, false, nor very true and not very false, etc2.; (2) imprecise truth tables; and (3) rules of inference whose validity is relative to a context rather than exact.”
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