Answer:
Doing so strengthens the ethos, logos, and pathos of the argument.
Step-by-step explanation:
Providing a counterargument means that a paper and its author understand other people's perspectives. It also means that the author had thought through the argument and what others might say. A counterargument means that an author is well read and has studied all sides of an argument. Additionally, it shows that the author has the ability to rebut points made by people that disagree with them.
This helps appeal to readers through ethos, logos, and pathos. It strengthens ethos because the extra information provides credibility. The counterargument also can change a reader's feelings, which shows pathos. Finally, logos is strengthened because a strong rebuttal appeals to one's logic.