A polemic (pron.: /pəˈlɛmɪk/) is a contentious argument that is intended to establish the truth of a specific belief and the falsity of the contrary belief. Polemics are mostly seen in arguments about very controversial topics.
The art or practice of such argumentation is called polemics.
A person who often writes polemics, or who speaks polemically, is a polemicist or a polemic. The word is derived from the Greek πολεμικός (polemikos), meaning “warlike, hostile”, which comes from πόλεμος (polemos), “war”.