Answer :
The purpose of using a counterargument is to anticipate a reader or opponent´s concerns and rebuff them to show that they are false.
What is a Counterargument?
This refers to the use of argument and logic to anticipate and counter an argument of an opponent.
Please note that your question is incomplete so I gave you a general overview so that you could get a better understanding of the concept.
Read more about counterarguments here:
https://brainly.com/question/10613624