 Here the authors stress that a good logic is a means for acquiring knowledge rather than a tool for organizing it into premises and conclusion. The final point is that when ideas are made properly clear and distinct, the natural light of reason requires no assistance from rules. We had been previously warned that primary utility of formal rules consists in the exercise of the natural light that might come from working through them. The authors continued that evaluation by pointing out that the chapter titles can guide readers in omitting this relatively unimportant “exercise” if they wish (Logic, 10). They thus regard Part IV on method as more important than Part III on formal reasoning.