 Credibility granted to speakers and their testimony affects processes of arguing and may adhere to social categories following lines of gender and other axes of oppression (Govier 1993). Miranda Fricker (2007) describes the case of testimonial injustice, which is a species of epistemic injustice, and identifies when a listener gives diminished credibility or epistemic authority to a speaker based on that speaker’s social identity. Patrick Bondy (2010) defines analogous “argumentative injustice” as consisting in a related harm done to the processes of arguing when people wrongly assess an arguer’s credibility. We can underestimate or overestimate an arguer’s credibility by using social stereotypes to assess it (2010). Bondy explains that both overestimation and underestimation can result from viewing testifiers through social stereotypes—typically men’s credibility becomes overestimated whereas women’s becomes underestimated. Additionally, testimony from people with social identities different from our own may be difficult to accept simply because their experiences contrast with our own and those experiences with which we identify. This second problem when considered as a fallacy goes by the name of “provincialism” (Kahane &amp; Cavender 2001) and is sometimes attributed to the psychology of in-group bias (Brewer 1979; Rudman &amp; Goodman 2004). Whether due to stereotypes or to in-group bias, being discounted as a participant in discussion amounts to an epistemic injustice that Christopher Hookway (2010) describes as “participant injustice”.