A lawyer on direct examination asks his witness, a layperson with no legal training, "So John Doe was driving negligently?" Opposing counsel could raise an argumentative objection. In this context, "negligently" is a legal term of art with a precise and narrow meaning, and the witness cannot reasonably answer the question without understanding the relevant law. Since the lawyer is "arguing" his case that John Doe was driving negligently through the witness, the objection would be sustained and the improper statements stricken from the record.
Since the turn of the new century, a theory has emerged concerning the end of the world, or at least the end of life as we know it. This new theory centers around the year 2012, a date that many claim has mysterious origins in ancient manuscripts from many different cultures. The most noted characteristic of this date is that it appears to mark the end of the Mayan calendar. But there is no evidence to suggest that the Maya saw any great relevance to this date. In fact, none of the claims surrounding a 2012 doomsday event hold up to scientific inquiry. The year 2012 will pass without a major, life-altering catastrophe .
The function of an argumentative essay is to show that your assertion (opinion, theory, hypothesis) about some phenomenon or phenomena is correct or more truthful than others'. The art of argumentation is not an easy skill to acquire. Many people might think that if one simply has an opinion, one can argue it successfully, and these folks are always surprised when others don't agree with them because their logic seems so correct. Argumentative writing is the act of forming reasons, making inductions, drawing conclusions, and applying them to the case in discussion; the operation of inferring propositions, not known or admitted as true, from facts or principles known, admitted, or proved to be true. It clearly explains the process of your reasoning from the known or assumed to the unknown. Without doing this you do not have an argument, you have only an assertion, an essay that is just your unsubstantiated opinion.