Emily Dickinson Lexicon

PA-RAL'O-GISM, n. [Gr. παραλογισμος; παρα, beyond, and λογισμος, reasoning; λογος, discourse, reason.]

In logic, a fallacious argument or false reasoning; an error committed in demonstration, when a consequence is drawn from principles which are false, or though true, are not proved; or when a proposition is passed over that should have been proved by the way. – Encyc.