Elench
Elench (e*lenk") , noun
[Latin elenchus, Greek {not transcribed}, from {not transcribed} to convict, confute, prove: compare Old French elenche.]
(a)
(Logic) That part of an argument on which its conclusiveness depends; that which convinces of refutes an antagonist; a refutation.
(b)
(Logic) A specious but fallacious argument; a sophism.