SOPHISTRY, n. The controversial method of an opponent, distinguished from one's own by superior insincerity and fooling. This method is that of the later Sophists, a Grecian sect of philosophers who began by teaching wisdom, prudence, science, art and, in brief, whatever men ought to know, but lost themselves in a maze of quibbles and a fog of words.
His bad opponent's "facts" he sweeps away,
And drags his sophistry to light of day;
Then swears they're pushed to madness who resort
To falsehood of so desperate a sort.
Not so; like sods upon a dead man's breast,
He lies most lightly who the least is pressed.
2008 Update: Persuasion by deceptive reasoning rather than by bribery, flattery, sympathy, grievance, compulsion or tribe.