It is significant that in refuting error the Polemicists appealed extensively to New Testament books as the source of true doctrine. Thus they gave impetus to the later official pronouncements on the contents of the New Testament canon. The work of the Polemicists also gave rise to the concept of an orthodox catholic church opposed to heresy. Since chapter 7 seeks to define those errors, attention here focuses only on some chief attackers of them. The Polemicists Purpose: to attack error Leaders