paralogistic
/pəˌraləˈdʒɪstɪk/rare
adjective
Characterized by or involving false reasoning; fallacious.
Origin
Late 17th century; earliest use found in Theophilus Gale (1628–1679), ejected minister and theologian. From ancient Greek παραλογιστικός fallacious from παρα- + λογιστικός.