soph·ist·ry /ˈsɑfəstri/
  詭辯
  Soph·ist·ry n.
  1. The art or process of reasoning; logic. [Obs.]
  2. The practice of a sophist; fallacious reasoning; reasoning sound in appearance only.
     The juggle of sophistry consists, for the most part, in usig a word in one sense in the premise, and in another sense in the conclusion.   --Coleridge.
  Syn: -- See Fallacy.
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  sophistry
       n : a deliberately invalid argument displaying ingenuity in
           reasoning in the hope of deceiving someone [syn: sophism,
            sophistication]