Maybe the Central Question?

There are two questions we might ask about the relationship between the world and the way we speak:

(1)    How does the fact that we have a shared experience of the world validate the way we talk about it?

(2)    How does the fact that we can talk about the world in the way that we do validate our sense of shared experience?

The first one has been the focus of the Western empiricist tradition, but only the second one can be rendered intelligible.

With respect to (1), we cannot even ask questions about our shared experience, or mutually investigate the intelligibility of what we say, without attributing some minimal sense to what we say to one another.

With respect to (2), the question 'can we talk about the world?' can only be answered in the affirmative, since its denial is a statement about the world - that we cannot talk about it. Since we can talk about the world, we can draw conclusions about its nature, and some of these conclusions will have a bearing on what we mean by 'sharing experience', and to what extent we actually achieve this.