 A first strategy fits neatly with the view of narrow content as a diagonal proposition. If we want to know the narrow content of a particular mental state, we simply construct the diagonal proposition. That is, we first envision a variety of situations or environments in which the mental state could be embedded, i.e. a set of contexts or centered worlds that contain, at the center, the very mental state whose content we are interested in. For each of these contexts, we use our knowledge of broad content and how it is determined to discover the broad content that the mental state would have in that context. And then we determine whether, in the world of that context, a belief with that broad content would be true.