If you counter with a fallacious argument.....

It is essentially the same thing. Fallacious reasoning can be employed when evaluating an argument or making one. But the two aren't always equal. For example, some fallacies are very difficult to detect, and even people with excellent reasoning skills might fall victim to the fallacy. So the important point is, there are degrees of fallaciousness.

I hope this answered your question.

Excellent Question.
It raises the possibility that to speak, is to lie
It may be better to not say anything, only ask questions....