As one of the foundations of persuasion, fallacies should be included in the teaching of persuasive speaking. It is important that speakers avoid misleading their audience as they have an ethical responsibility to tell the truth and avoid misleading information. If discovered, fallacies in messages can damage the credibility of the speaker and affect how their messages are received in the future. Fallacious arguments can be avoided when public speaking students critically examine the persuasive messages of others. Advertising is an easily identifiable form of persuasion, though, because the purpose of an advertisement is to encourage the purchase of goods or products. Often the claims made in advertisements are not always logical or entirely true, as the positives of the product are presented in a way to downplay the negatives. One form of advertising in particular, the infomercial, relies on presenting the positive characteristics of a product based on savings, convenience, and functionality. The presence of fallacies in infomercials is almost guaranteed. Through the use of infomercials, this activity serves to help students gain an understanding of fallacies and develop skill in producing fallacy-free persuasive messages. Presenting a list of common fallacies by providing definitions and examples in class may help students understand what they are, but it does not address whether or not students can recognize and correct fallacies in their own persuasive messages. This activity allows the instructor to assess students' understanding of fallacies by having them identify and name the false reasoning present in infomercials and also provides students with practice in creating fallacy-free messages. Although many forms of persuasive messages could accomplish the same task, this activity serves to build a foundation of identifying false reasoning. Often the claims made in infomercials are so over the top that students can easily identify the fallacies presented and then are able to move on to identifying more subtle fallacies presented in alternative forms of persuasion. A list of references and suggested readings is included. (Contains 1 figure.)