Marquage épistémique et construction de l’autorité dans les discours de théories du complot : étude de cas

What is central to conspiracy theories is the revelation of a hidden or manipulated truth. In addition, the speaker/writer who believes in a conspiracy theory and shares their views on it also seeks the listener’s/reader’s adhesion to the theory. As a result, the speaker/writer must solve two problems: first, the version in which they believe has to be perceived as plausible by the audience and, second, the speaker/writer must have, or gain, credit in order to appear credible. These two aspects are somewhat subsumed under what Biber and Hyland, among others, refer to as stance and stance-taking, which correspond to the positioning of a locutor towards viewpoints and interlocutors. In order to analyze these aspects and the relations between the linguistic markers and the discursive strategies (pragmatic, argumentative, or rhetoric), this study is based on a corpus analysis of online articles written by Jon Rappoport, an unequivocal conspiracy theorist. I only focus on plausibility hedges and certainty boosters so as to study the marking of authoritative and epistemic stance in his discourses and the function(s) they perform. The results show that both plausibility hedges and certainty are used to legitimize Rappoport’s theories and strengthen his authority in various ways, depending on the devices used. Plausibility hedges are mainly used to voice a dissenting interpretation of reality, presented as a possibility that cannot be ruled out, and downplay the elite’s viewpoints. Certainty boosters are used to express the author’s confidence and commitment towards his theories, by presenting his interpretation of reality as unquestionable, self-evident or consensual. Finally, the use of first-person pronouns and booster or hedge verbs are also used to strengthen the legitimacy of the theories and the authority of the author by explicitly indicating his contribution to the construction of conspiracy theories or to introduce and support a dissident viewpoint.