Source : Webster's Revised Unabridged Dictionary (1913)

Sophistry \Soph"ist*ry\, n. [OE. sophistrie, OF. sophisterie.]
   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}.

Source : WordNet®

sophistry
     n : a deliberately invalid argument displaying ingenuity in
         reasoning in the hope of deceiving someone [syn: {sophism},
          {sophistication}]