Sure, if there is a 'rest of the comment'. Usually, there isn't anything else to go by. There's just the fallacious argument. It doesn't matter whether you can

Sure, if there is a 'rest of the comment'. Usually, there isn't anything else to go by. There's just the fallacious argument. It doesn't matter whether you can think of all kinds of ways to support the point of view the other espouses: you're not in his head and you can't know whether he thought all the things you can think of in favour of his position. There's only the fallacious argument and that needs to be struck down. If someone else wants to support the position, he'll come along.