 Epistemic injustice is a philosophical concept developed in order to capture the way in which we can be discriminated against when our credibility is unfairly reduced when we speak. Because you are from this ethnic group, or because you are a woman, or because of how you dress, or because of your socioeconomic status. So it's an injustice done to somebody in their capacity as a speaker, as a knower. And of course it's particularly significant within healthcare because these contributions from patients are sometimes overlooked or ignored or not acted upon. And this of course could have dire consequences for the quality of the clinical care that they receive.