From the unbelievable to the undeniable: Epistemological pluralism, or how conspiracy theorists legitimate their extraordinary truth claims

© The Author(s) 2019.Despite their stigma, conspiracy theories are hugely popular today and have pervaded mainstream culture. Increasingly, such theories expanded into large master schemes of deceit where ‘everything is connected’. Moving beyond discussions of their truthfulness, we study in this article how such ‘super conspiracy theories’ are made plausible. We strategically selected the case study of David Icke – a true celebrity in conspiracy circles and main proponent of such all-encompassing narratives – to analyze his discursive strategies of legitimation: How does he support and validate his extraordinary claims? It is our argument that Icke succeeds by exploiting multiple sources of epistemic authority; he draws eclectically on ‘experience’, ‘tradition’, ‘futuristic imageries’, ‘science’ and ‘social theory’ to convince his audience. In a Western culture without any full monopoly on truth, and for a people wary of mainstream authorities, it proves opportune to draw on a wide variety of epistemic sources when claiming knowledge.