Fallacies are mistakes in reasoning. In this chapter we will be concerned specifically with informal fallacies. In chapter five we already dealt with certain species of formal fallacy, such as denying the antecedent and affirming the consequent. A formal fallacy is an argument that contains a mistake in reasoning because of its structure. In contrast, an informal fallacy involves a mistake in reasoning that goes beyond the structure of the argument and that needs inspection of its content to be recognized.
Informal fallacies are arguments that often seem, at first glance, to be good arguments although they are not. They are bugs in our thinking in the sense that many people find it quite natural to accept and use them even though they are defective kinds of thinking. The capacity to spot fallacies not only helps us to formulate our own reasoning more precisely and correctly; it also helps us to avoid being seduced by the bad reasoning of others and it provides us with valuable means of evaluating reasoning. (Without endorsing their use, we also feel compelled to point out that the deliberate use of certain informal fallacies can be strategically effective—certain politicians and advertisers are notoriously prone to using them, to powerful effect! Nevertheless, they amount to failures in the reasoning process. Do not use your …show more content…
They often do so by focusing on who, when, why, or how something is said, rather than on the substance of the reasoning.
Appeal to Pity (Argumentum ad