"Bad reasoning as well as good reasoning is possible; and this fact is the foundation of the practical side of logic"

In this quote, Charles Sanders Peirce is highlighting the importance of logic in our daily lives. He acknowledges that both bad and good reasoning are possible, and this is a crucial aspect of reasoning. Peirce recommends that the useful side of logic depends on understanding and recognizing the difference in between these two kinds of reasoning. By being aware of the possibility of bad reasoning, we can strive to enhance our own reasoning skills and make more logical decisions. This quote acts as a reminder that reasoning is not simply a theoretical principle, however rather a useful tool that can greatly impact our actions and options.