Someone comes up with a view about the relationship between language and the world, such that there are things out there in the world that you can't talk about. They come up with a view to the effect that there are limits to language. There are many such views.
The problem that such a view faces is that, if you say there are such things, and even worse if you argue that there are such things – as all these philosophers do – then you must talk about them. So the view itself says that these things go beyond language. And yet, the very fact of arguing for it shows that they don't. That's the problem.
The problem that such a view faces is that, if you say there are such things, and even worse if you argue that there are such things – as all these philosophers do – then you must talk about them. So the view itself says that these things go beyond language. And yet, the very fact of arguing for it shows that they don't. That's the problem.