A debate and an argumentation are used interchangeably, however there is a slight difference between the two concepts.

A debate is a discussion between sides with different views. Persons speak for or against something before making a decision. Debates are a means of encouraging critical thinking, personal expression, and tolerance of others' opinions. Debates are conducted in governing assemblies, held in lecture halls and public arenas, presented in schools and universities, written in newspaper and magazine columns, heard on radio, or seen on the television. People argue about what is best for their societies and shape the course of law, policy, and action.

On the other hand, an argumentation is not necessarily confrontational nor bickering. It is persuasion. An argument is a logical, highly developed statement or statements offering support for a claim. It maybe a speech or in writing intended to convince by establishing truth. Most argumentation begins with a statement of an idea or opinion, which is then supported with logical evidence. Another technique of argumentation is the anticipation and rebuttal of opposing views.

References:

• http://42explore.com/debate.htm
• doe.sd.gov/contentstandards/languagearts/docs/ReadingGlossaryofTerms.doc