In this paper, we propose that there is a speech act structure in the nominal spine, just as there is in the clausal spine whose function is to encode what we do when we utter a nominal: i.e., we name, describe, or track individuals. Thus, speech act structure establishes a link between the discourse referent and the speech act situation. The evidence we discuss comes from nominals that lack this speech act structure, namely impersonal pronouns. We argue that impersonal pronouns have in common that they lack nominal speech act structure but are not otherwise a natural class: they vary in syntactic structure. Thus, we propose a novel formal typology of impersonal pronouns.