The thesis is the essence of an argumentative essay. In a single, clear sentence, it sums up what point you are trying to make. The thesis statement should assert a position on a particular issue -- one that a reader can potentially argue against. Therefore, the thesis cannot be a fact. For example, if a professor assigns the general topic of war, you can formulate the following thesis statement: "The United Nations must be redesigned because it is currently incapable of preventing wars." The rest of your essay serves to explain and provide evidence in support of your thesis statement.
ln technical writing , the introduction typically includes one or more standard subsections: abstract or summary, preface , acknowledgments, and foreword . Alternatively, the section labeled introduction itself may be a brief section found side-by-side with abstract, foreword, etc. (rather than containing them). In this case the set of sections that come before the body of the book are known as the front matter . When the book is divided into numbered chapters, by convention the introduction and any other front-matter sections are unnumbered and precede chapter 1.