Latin: A term of logic, sometimes applied to pleadings and to arguments on appeal, which signifles a mistake of the question, that is, the mistake of one who, failing to discern the real question which he is to meet and answer, addresses his allegations or arguments to a collateral matter or something beside the point See Case upon the Statute for Distribution, Wythe (Va.) 309.
Ignoratis terminis artis, ignoratur et ars. Whore the terms of an art are unknown, the art itself is unknown also. Co. Litt 2a.