What sorts of things are the things we believe, hope, or predict?
It is part of our everyday life that we ascribe beliefs, desires, hopes, claims, predictions and so on to other people and ourselves, and the ascription of such propositional attitudes, as they are called, generally takes a canonical form, of the sort John believes that Macron is president of France, Mary hopes that Macron is president of France, and Joe predicted that Macron would become president of France.