This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1860 Excerpt: ...might think of the individual X, the quality X-ic, the class X-kind, and the attribute X-ity. 121. Identical terms are those which apply to precisely the same objects of thought, neither representing more than the other: 121-124. UNIVERSE. CONTRARIES-' _ so that identical terms are different names of the 'samta class. ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1860 Excerpt: ...might think of the individual X, the quality X-ic, the class X-kind, and the attribute X-ity. 121. Identical terms are those which apply to precisely the same objects of thought, neither representing more than the other: 121-124. UNIVERSE. CONTRARIES-' _ so that identical terms are different names of the 'samta class. Thus, for this earth, man and rational animal are identical terms. The symbol XY will be used ( 57) to represent that X and Y are identical. When of two identical terms one, the known, is used to explain the other, the unknown, the first is called the definition of the second. 122. The whole extent of matter of thought under consideration I call the universe. In common logic, hitherto, the universe has always been the whole universe of possible thought. 123. Every term which is used ( 16) divides the universe into two classes; one within the term, the other without. These I call contraries: and I denote the contrary class of X, the class not-X, by x. When the universe is unlimited contrary names are of little effective use; not-man, a class containing every thing except man, whether seen or thought, is almost useless. It is otherwise in a limited universe, in which contraries, by separate definiteness of meaning, cease to be mere negations eaofo of the other, and even acquire separate and positive names. Thus, the universe being property under English law, real and personal are contrary classes. Logic has nothing to do with the difficulties of allotment which take place near the boundary: with the decision upon those personals, for example, which, as the lawyer says, savour of the realty. The lawyer must determine the classification, and logic investigates the laws of thought which, then apply. If the lawyer choose to make an inter...
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