The case for probabilistic assertion
This chapter develops and defends the thesis that we can assert probabilistic contents. The chapter begins by recounting some familiar arguments against the standard view that we only ever assert propositions. A probabilistic theory of assertion is then defended with three novel arguments. These arguments are less empirical than familiar arguments against the standard view, and more foundational in character. It is argued that probabilistic contents of assertion provide a unified account of how we communicate probabilistic beliefs and full beliefs, a unified account of belief and assertion, and an adequate account of how probabilistic beliefs can figure in joint reasoning and guide our collective actions. The chapter concludes with some remarks about probabilistic models of communication, as well as remarks about the conclusions that we should draw from contemporary debates about the semantics of epistemic modals.