Obversion Ob*ver"sion ([o^]b*v[~e]r"sh[u^]n), n. [L. obversio a turning towards.] 1. The act of turning toward or downward. [1913 Webster]

2. (Logic) The act of immediate inference, by which we deny the opposite of anything which has been affirmed; as, all men are mortal; then, by obversion, no men are immortal. This is also described as ``immediate inference by privative conception.'' --Bain. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • obversion — [ɔbvɛʀsjɔ̃] n. f. ÉTYM. V. 1900; bas lat. obversio « action de tourner vers », de obversum; → Obvers. ❖ ♦ Log. Opération par laquelle on substitue son contradictoire au prédicat d une proposition …   Encyclopédie Universelle

  • obversion — [äb vʉr′shən, əbvʉr′shən; äb vʉr′zhən, əb vʉr′zhən] n. [LL obversio < L obversus: see OBVERSE] 1. the act of obverting 2. Logic the act of inferring the obverse …   English World dictionary

  • Obversion — In traditional logic, obversion is a type of immediate inference in which from a given proposition another proposition is inferred whose subject is the same as the original subject, whose predicate is the contradictory of the original predicate,… …   Wikipedia

  • obversion — /ob verr zheuhn, sheuhn/, n. 1. an act or instance of obverting. 2. something that is obverted. 3. Logic. a form of inference in which a negative proposition is obtained from an affirmative, or vice versa, as None of us is immortal is obtained by …   Universalium

  • obversion — ob•ver•sion [[t]ɒbˈvɜr ʒən, ʃən[/t]] n. 1) an act or instance of obverting 2) pho a form of inference in which a negative proposition is obtained from an affirmative, or vice versa, as “None of us is immortal” is obtained by obversion from “All… …   From formal English to slang

  • obversion — /ɒbˈvɜʒən/ (say ob verzhuhn) noun 1. the act or result of obverting. 2. Logic a form of inference in which a negative proposition is inferred from an affirmative or an affirmative from a negative. {Late Latin obversiōn , stem of obversiō} …   Australian English dictionary

  • obversion — äbˈvərzhən, və̄zh , vəizh also shən noun ( s) Etymology: Late Latin obversion , obversio, from obversus (past participle of obvertere) + ion , io ion logic : the operation of immediate inference that gives the obverse …   Useful english dictionary

  • obversion — É‘b vÉœrʃn /É’b vɜːʃn n. reversal; inversion …   English contemporary dictionary

  • obversion — ob·ver·sion …   English syllables

  • Obversión lógica — Una obversión lógica es una de las operaciones que la lógica clásica tradicional admitía como operación lógica. Consiste en la modificación del juicio aristotélico de forma que cambiando la cualidad del juicio, afirmativo negativo, y negando el… …   Wikipedia Español

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