Argumentation is usually associated with debate. Using argumentation in public speaking does not require being adversarial. To use it effectively can enhance the experience for the listener.
Your first thought might be to avoid it, especially when trying to persuade. The kind of argument being discussed here is not bickering or being obnoxious or even debate. Do not think of it as attacking the opposing point of view.
In its simplest form, it is putting forth reasons for or against a point of view. It can involve deductive reasoning, presentation and elaboration. It starts with a proposition, the expression of a point of view on a subject. Then supporting evidence is added and principles to support the proposition are used. Follow through with reasoning on the matter, applying inductions and deductions to the proposed thought.
An informative speech is presented as information or fact even though it is given as one persons interpretation of that information. Argumentation requires calling into question that interpretation and coming to its defense, refuting it, or offering a new view point.
Why Use Argumentation
Some subjects by their...