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1. Oxford American Dictionary

   obvert

   • IPA[əbˈvərt]

   美式

   • v.
     alter (a proposition) so as to infer another proposition with a contradictory predicate, e.g., “no men are immortal” to “all men are mortal.”.

   • verb: obvert, 3rd person present: obverts, gerund or present participle: obverting, past tense: obverted, past participle: obverted

2. • 更多解釋

   obvert

   • IPA[əbˈvəːt]

   英式

   • v.
     alter (a proposition) so as to infer another proposition with a contradictory predicate, e.g. ...

   Oxford Dictionary