What is the function of "cogent" in an argument?

The term "cogent" refers to an argument that is clear, logical, and convincing. When an argument is described as cogent, it means that it effectively persuades the audience by presenting well-structured reasoning, sound evidence, and a persuasive presentation of facts. A cogent argument succinctly connects the evidence presented to the conclusion drawn, making it compelling for the audience to accept the argument being made.

In contrast, the other options do not encapsulate the essence of cogency. Misleading or confusing arguments lack clarity and logical structure, which is the opposite of being cogent. Establishing new evidence, while potentially important in developing an argument, does not directly define the persuasive quality that "cogent" conveys. Finally, restricting conversation does not relate to the effectiveness of persuasion but rather suggests an inability to engage in productive dialogue, which is contrary to the goal of presenting a cogent argument. Therefore, the function of "cogent" is to persuade effectively, aligning with the correct answer.