Guide to Critical Thinking. Guide to Critical Thinking. Grades 7-12 Instructors and Students. Fallacies. What this handout is about This handout discusses common logical fallacies that you may encounter in your own writing or the writing of others. The handout provides definitions, examples, and tips on avoiding these fallacies. Arguments. Logic Games. - Wikibooks, open books for an open world. Philosophy Course Notes. Symbolic Logic (PHIL 120)