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Polemics (pronounced /pəˈlɛmɪks, poʊ-/) is the practice of disputing or controverting religious, philosophical, or political matters. As such, a polemic text on a topic is often written specifically to dispute or refute a topic that is widely viewed to be beyond reproach.
Veneration of the Beatles is out of wack with its importance, thus people hold that they are 'beyond reproach'. I was attacking this in a polemical fashion.