[ pə'ralədʒɪz(ə)m ]
■ noun Logic a piece of illogical or fallacious reasoning, especially one which appears superficially logical.
Derivatives
paralogical adjective
paralogically adverb
paralogist noun
Origin
C16: from Fr. ~e , via late L. from Gk ~os , from paralogizesthai 'reason falsely'.