SOPHISM
sophism, sophistry, sophistication
(noun) a deliberately invalid argument displaying ingenuity in reasoning in the hope of deceiving someone
Source: WordNet® 3.1
Etymology 1
Noun
sophism (countable and uncountable, plural sophisms)
A method of teaching using the techniques of philosophy and rhetoric.
(informal) A flawed argument, superficially correct in its reasoning, usually designed to deceive.
(informal) An intentional fallacy.
Etymology 2
Noun
sophism (uncountable)
Archaic spelling of Sufism.
Source: Wiktionary
Soph"ism, n. Etym: [F. sophisme, L. sophisma, fr. Gr.
Definition: The doctrine or mode of reasoning practiced by a sophist;
hence, any fallacy designed to deceive.
When a false argument puts on the appearance of a true one, then it
is properly called a sophism, or "fallacy". I. Watts.
Let us first rid ourselves of sophisms, those of depraved men, and
those of heartless philosophers. I. Taylor.
Source: Webster’s Unabridged Dictionary 1913 Edition