Dialectic and Rhetoric, but not Debate

"Dialectic is based on a dialogue between two or more people who may hold differing views, yet wish to seek the truth of the matter through the exchange of their viewpoints while applying reason. This differs from a debate, in which both sides are committed to their viewpoint and only wish to win the debate by persuading or proving themselves right (or the other side wrong) – and thus a jury or judge is often needed to decide the matter. It also differs from rhetoric, which is oratory that appeals to logos, pathos, or ethos." wiki

logos, pathos and ethos are greek words and mean reason, experience (emotions) and ethics, respectively. Rhetoric is the art of persuasion. Using it to prove a point in an argument regarding Art is relevant and makes argument itself be an act of Art.

Dialectic as a method of cognition of reality and discovering 'The Truth' proved to be very effective. It is based on the principle of thesis-antithesis-synthesis. If a person from south and a person from north talk about the best weather, they most likely will end up in an argument. If we apply dialectic to this situation and say that the southern person's opinion is a thesis and the northern person's opinion is the antithesis, then a synthesis of their opinions would take each of them and anyone who witnessed their argument to a high level of understanding of what the best weather is. Using their experience, each of them will add to the knowledge about the best weather and refute each other's prejudice about it as well. Their new opinion is now a new thesis, a western person's opinion or an eastern person's opinion (or a synthesis of both) will be the antithesis to it and the new opportunity to improve. It was a simplified example, you know that topics are often more complex and opinions are multiple, as well as it is still arguable whether there is the final instance of truth or just a better understanding of it, nevereinding process of imrpovement. (<- this was me using rhetoric in order to persuade you)

Debate implies that the arguing parties nolonger look for improvement and/or for some reason are interested in proving their point. Debates are usually held by conscious enitties for a third party in order to win its support or to show it a better way to go. It often occurs in politics and justice which are srs business for srs people.