Availability without common ground

Abstract The dominant model of linguistic communication in current philosophy of language, semantics and formal pragmatics is centered around the idea that communication involves interlocutors coordinating with respect to a single body of information, the common ground. This body of information is understood to serve two central roles: it is the target of speech acts, and constitutes the information available to interlocutors for planning and interpreting utterances. In this paper, I provide a series of examples which show that, contra the dominant model, the information available to interlocutors cannot be modeled as common ground information. The examples involve interpreters making use of background information which cannot become common ground either because the interpreter refuses to accept it, or because the communicative situation is what Harris (2020) calls publicity averse . I consider and disarm a variety of responses that might be offered on behalf of the common ground view, including alternative construals of acceptance and of publicity. I demonstrate that a model of communication in which interlocutors maintain separate representations of their own and their interlocutors' information states easily accommodates these cases, taking as an example the model due to Heller and Brown-Schmidt (2023). I end the paper with the observation that my conclusions do not pose any threat to formal models of dynamic semantics/pragmatics, as these can be, and in some cases already are, interpreted as modelling the evolution of individual information states