There is no reason to argue, it should be reason argument and citation argument. Argument and argument are two different concepts, but they are a little confused.

Three elements of argumentative writing: argument, argument and argumentation

Simply put, arguments are the basis of discussion, including factual arguments and rational arguments.

Argumentation is a method to prove an argument, including example argument (that is, factual argument), quotation argument (rational argument), metaphor argument, positive and negative comparison and so on.