| 释义 |
obversion|əbˈvɜːʃən|
[ad. L. obversiōn-em, n. of action from obvertĕre to obvert.]
1. The action of turning towards some person or thing.
1864in Webster.
2. Logic. A form of immediate inference in which, by changing the quality, from one proposition another is inferred, having a contradictory predicate. Also called permutation.
1870A. Bain Logic i. 110 In affirming one thing, we must be prepared to deny the opposite: ‘the road is level’, ‘it is not inclined’, are not two facts, but the same fact from its other side. This process is named Obversion. 18..Bain Educ. as Sc. in Cycl. Sci. (U.S.) I. 539 The most searching equivalence of verbal forms is Obversion, or the stating of a fact from its other side. 1896J. Welton Man. Logic (ed. 2) I. iii. iii. 251 Obversion is a change in the quality of a predication made of any given subject, whilst the import of the judgment remains unchanged. The original proposition is called the Obvertend, and that which is inferred from it is termed the Obverse.
3. The formation of an obverse or counterpart.
1892Daily News 3 Sept. 3/3 There is no need..to insist that in the matter of mind, this distinct obversion should exist, which nature demands not. |