polemics
n. pl. விவாதக்கலை, விவாதப்பயிற்சி, சமயவாதத்துறை.
Po*lem"ics, n. Etym: [Cf. F. polémique.] Defn: The art or practice of disputation or controversy, especially on religious subjects; that branch of theological science which pertains to the history or conduct of ecclesiastical controversy.