Secondary belief content, what is it good for?

Some use the need to explain communication, agreement, and disagreement to argue for two-dimensional conceptions of belief content. One prominent defender of an account of this sort is David Chalmers. Chalmers claims that beliefs have two kinds of content. The second dimension of belief content, which is tied to what beliefs pick out in the actual world, is supposed to help explain communication, agreement, and dis agreement. I argue that it does not. Since the need to explain these phenomena is the main stated motivation for the addition of the second dimension of belief content, my arguments also undermine the motivation for Chalmers’ two-dimensional account of belief content and theories like it