obversionn.

Brit.

/əbˈvəːʃn/,

/ɒbˈvəːʃn/, U.S.

/əbˈvərʒ(ə)n/,

/ɑbˈvərʒ(ə)n/,

/əbˈvərʃ(ə)n/,

/ɑbˈvərʃ(ə)n/

Origin: A borrowing from Latin. Etymons: Latin obversion-, obversio.

Etymology: < post-classical Latin obversion-, obversio action of turning towards (4th cent) < classical Latin obvers- , past participial stem of obvertere obvert v. + -iō -ion suffix¹.

†1. The action of turning towards a person or thing. Obsolete. rare.

ΚΠ

1864 in Webster's Amer. Dict. Eng. Lang. (1865) 904/3 Obversion, the act of turning toward or downward.

2. Logic. A form of immediate inference in which the predicate of the contrary or the subcontrary of a proposition is negated, so as to obtain another proposition logically equivalent to the original. Also called permutation.

ΘΚΠ

the mind > mental capacity > philosophy > logic > predicate or propositional logic > [noun] > logical inference > obversion

permutation1851

obversion1870

1870 A. 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.

1896 J. 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.

1931 R. M. Eaton Gen. Logic 206 Obversion, also known as permutation differs from conversion in that the subject and predicate do not change places.

1994 Noûs 28 483 Argument [A1] is neither an obversion nor a conversion nor any justifiable form of immediate inference.

3. The formation of an obverse or counterpart. rare.

ΘΚΠ

the world > relative properties > relationship > correlation > [noun] > a complement or counterpart > formation of

obversion1892

1892 Daily 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.

1973 W. Everson Blame it on Jet Stream in Integral Years (1999) ii. 35 This obversion of our deepest values By our deepest minds?

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	obversion
释义	obversionn. Brit. /əbˈvəːʃn/, /ɒbˈvəːʃn/, U.S. /əbˈvərʒ(ə)n/, /ɑbˈvərʒ(ə)n/, /əbˈvərʃ(ə)n/, /ɑbˈvərʃ(ə)n/ Origin: A borrowing from Latin. Etymons: Latin obversion-, obversio. Etymology: < post-classical Latin obversion-, obversio action of turning towards (4th cent) < classical Latin obvers- , past participial stem of obvertere obvert v. + -iō -ion suffix¹. †1. The action of turning towards a person or thing. Obsolete. rare. ΚΠ 1864 in Webster's Amer. Dict. Eng. Lang. (1865) 904/3 Obversion, the act of turning toward or downward. 2. Logic. A form of immediate inference in which the predicate of the contrary or the subcontrary of a proposition is negated, so as to obtain another proposition logically equivalent to the original. Also called permutation. ΘΚΠ the mind > mental capacity > philosophy > logic > predicate or propositional logic > [noun] > logical inference > obversion permutation1851 obversion1870 1870 A. 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. 1896 J. 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. 1931 R. M. Eaton Gen. Logic 206 Obversion, also known as permutation differs from conversion in that the subject and predicate do not change places. 1994 Noûs 28 483 Argument [A1] is neither an obversion nor a conversion nor any justifiable form of immediate inference. 3. The formation of an obverse or counterpart. rare. ΘΚΠ the world > relative properties > relationship > correlation > [noun] > a complement or counterpart > formation of obversion1892 1892 Daily 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. 1973 W. Everson Blame it on Jet Stream in Integral Years (1999) ii. 35 This obversion of our deepest values By our deepest minds? This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < n.1864
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