I describe a phenomenon that has not yet been described in the epistemology literature. I label this phenomenon expression-style exclusion. Expression-style exclusion is an example of how social injustice affects whether audiences are in good epistemic states and whether speakers can exercise their epistemic capacities. Expression-style exclusion can cause audiences to have less rather than more understanding of a non-dominant speakers’ argument. And if expression-style exclusion obtains, then non-dominant speakers are less likely to express arguments in expression styles or ways of speaking such that they maximize their audiences’ understanding of them. This phenomenon partly explains the prevalence of white ignorance. I also argue that if expression-style exclusion obtains, then in addition to expressive and assertive speech act kinds, there is a further kind of speech act, namely a speech that aims to cause understanding in one’s audience.