Per fas et nefas
"Per fas et nefas" (Latin for "through right and wrong") refers to unfair eristic treatment. It occurs when Interlocutor A postulates a theory, and cites several reasons that justify it. Interlocutor B then refutes one of the arguments, and triumphantly declares that A's argument has no basis, even though he never said a word about the other arguments that A put forth.
See also
This article is issued from Wikipedia - version of the Wednesday, February 17, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.