Many of our beliefs are acquired online. Online epistemic environments are replete with fake news, fake science, fake photographs and videos, and fake people in the form of trolls and social bots. The purpose of this paper is to investigate the threat that such online fakes pose to the acquisition of knowledge. I argue that fakes can interfere with one or more of the truth, belief, and warrant conditions on knowledge. I devote most of my attention to the effects of (...) online fakes on satisfaction of the warrant condition, as these have received comparatively little attention. I consider three accounts of the conditions under which fakes compromise the warrant condition. I argue for the third of these accounts, according to which the propensity of fakes to exist in an environment threatens warrant acquisition in that environment. Finally, I consider some limitations on the epistemic threat of fakes and suggest some strategies by which this threat can be mitigated. (shrink)

If political fake news is a serious concern for democratic politics, no less worrisome is scientific news with patently distorted content. Prima facie, scientific misinformation partially escapes the definition of fake news provided by empirical and philosophical analysis, mainly patterned after political disinformation. Most notably, we aim to show that people are often unaware not only of disseminating, but also of producing false or misleading information. However, by leveraging the philosophical and psychological literature, we advance some reasons for keeping scientific (...) misinformation under the same umbrella, broadening the definition of fake news in order to account for it as well. In concluding, we shall advance some ideas on how to reform scientific communication, which may help to address the issue of scientific misinformation. (shrink)