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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Obversion
is an LSAT word you need to know.
So is converse. Does it mean:
| something opposite or contrary; a proposition obtained from another proposition by conversion |
| to go around or bypass, to avoid by artfulness or deception; to surround or encompass, as by stratagem; entrap |
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica
Encyclopedia
obversion
in syllogistic, or traditional, logic, transformation of a categorical proposition (q.v.), or statement, into a new proposition in which (1) the subject term is unchanged, (2) the predicate is replaced by its contradictory, and (3) the quality of the proposition is changed from affirmative to negative or vice versa. Thus the obverse of "Every man is mortal" is "No man is immortal." Because the obverse of any categorical proposition is logically equivalent to it, obversion is a form of immediate inference. See also conversion
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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