A person who gives you a counterargument is disagreeing with you.

I dont know what your asking but here A counter-argument is an argument opposed to your thesis, or part of your thesis. It expresses the view of a person who disagrees with your position.

Why would you include a counter-argument in your essay? Doesn’t that weaken your argument?

Actually, no. Done well, it makes the argument stronger. This is because it gives you the chance to respond to your reader’s objections before they have finished reading. It also shows that you are a reasonable person who has considered both sides of the debate. Both of these make an essay more persuasive.

True ...