Argumentative knowledge: the relationship between ideas and materials is an "argument" in argumentative writing, that is, the author's views and opinions on the issues discussed. Argumentative writing always asks questions, analyzes problems and solves problems in order to convince others. To do this, the author's point of view must be correct and distinct first. The so-called "correctness" is in line with objective reality and the scientific truth of Marxism-Leninism; The so-called "clear-cut" means that the position and attitude should be clear, and what to affirm, what to deny, what to approve of and what to oppose should be clear and unambiguous, and not specious and ambiguous. Therefore, the words used to express arguments in argumentative essays must be concise and exact, and not vague and wordy. Vagueness is the enemy of argument. Materials, in argumentative writing, are "arguments", that is, the basis for demonstrating arguments and the reasons for the author to establish his views. Arguments need arguments to prove. Argumentation serves the argument, so it must be consistent with the argument, which is commonly known as "the unity of views and materials"; If it is inconsistent, the argument will become the burden of the article and block the train of thought of the article. If the argument is true and reliable, the argument is persuasive; If the argument is unreliable, it will become a "castle in the air"; If the argument is not comprehensive and sufficient, it will be unconvincing. It can be seen that the relationship between them is very close.

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