From Wikipedia:
In logic and philosophy, an argument is an attempt to persuade someone of something, by giving reasons or evidence for accepting a particular conclusion. The general structure of an argument in a natural language is that of premises (typically in the form of propositions, statements or sentences) in support of a claim: the conclusion. Many arguments can also be formulated in a formal language. An argument in a formal language shows the logical form of the natural language arguments obtained by its interpretations.
In a typical deductive argument, the premises are meant to provide a guarantee of the truth of the conclusion, while in an inductive argument, they are thought to provide reasons supporting the conclusion’s probable truth.
The criteria used in evaluating arguments and their forms of reasoning are studied in logic. Ways of formulating arguments effectively are studied in rhetoric (see also: Argumentation theory).