 Obviously, the endorsement of a given semantic theory is bound to place important constraints on the claims one might propose about the foundational attributes of word meaning, and vice versa. Semantic and foundational concerns are often interdependent, and it is difficult to find theories of word meaning which are either purely semantic or purely foundational. According to Ludlow (2014), for example, the fact that word meaning is systematically underdetermined (a semantic matter) can be explained in part by looking at the processes of linguistic negotiation whereby discourse partners converge on the assignment of shared meanings to the words of their language (a foundational matter). However, semantic and foundational theories remain in principle different and designed to answer partly non-overlapping sets of questions.