Abstract
In his monograph Semantic Relationism, Kit Fine proposes two characterizations of coordination between proper names: an intuitive test; and a technical definition. The intuitive characterization is grounded in a notion of understanding distinct from the familiar notion of linguistic competence. Three prima facie appealing proposals to characterize this notion of understanding will be examined in the present paper and then dismissed as intrinsically implausible or as incompatible with Fine’s semantics. Not even his technical characterization of coordination, involving the notion of semantic requirement, will enable us to escape the impasse. Ultimately, the question of what exactly coordination between names is will remain open.