Should we Trust Our Feeds? Social Media, Misinformation, and the Epistemology of Testimony

When should you believe testimony that you receive from your social media feeds? One natural answer is suggested by non-reductionism in the epistemology of testimony. Avoid accepting social media testimony if you have an undefeated defeater for it. Otherwise, you may accept it. I argue that this is too permissive to be an adequate epistemic policy because social media have some characteristics that tend to facilitate the efficacy of misinformation on those platforms. I formulate and defend an alternative epistemic policy for belief on social media, which is inspired by reductionism in the epistemology of testimony.