Investigation is not an argumentative paper. The word investigation has many meanings in academic writing, including investigation, questionnaire survey, summary, summary, research report and so on. There is no definition of "argumentative essay". The purpose of investigation is to systematically investigate, summarize and analyze a certain field or a certain problem. Argumentative essay is an article that expounds the author's point of view, expounds the argument and tries to convince readers to accept their own point of view.