 Nonetheless, this federation model is not without its problems—problems that affect other versions of the union view as well. For if the federation (or the “we”, as on Nozick’s view) is understood as a third entity, we need a clearer account than has been given of its ontological status and how it comes to be. Relevant here is the literature on shared intention and plural subjects. Gilbert (1989, 1996, 2000) has argued that we should take quite seriously the existence of a plural subject as an entity over and above its constituent members. Others, such as Tuomela (1984, 1995), Searle (1990), and Bratman (1999) are more cautious, treating such talk of “us” having an intention as metaphorical.