Although there are two ways of argumentation and refutation, they are not completely separated. Refutation and establishment are dialectical unity. In argumentative writing, sometimes we have to refute the wrong argument; In refuting an article, it is generally necessary to clarify the correct point of view while refuting the wrong argument. Therefore, argumentation and refutation are often combined in argumentative writing.
The difference between direct refutation and indirect refutation
(1) if the direct argument, it is a direct rebuttal.
(2) If you refute the argument through various arguments, it is an indirect rebuttal.
(3) If the center is demonstrated through argumentation from beginning to end, it is a typical rebuttal, such as Lu Xun's On the Surprise of Friends.