In the setting of increasingly more fragmented digital communication settings, the accuracy and honesty of (political) information has become subject of fierce debates and partisan attacks. Hence, the challenge of mis- and disinformation not only pertains to the truthfulness of information itself, but also to the discursive construction of supporting information as truthful and dissonant information as untrue or deliberately false. This paper inductively analyzes discourses of (un)truthfulness (Study 1, N = 1,777) and uses an Automated Content Analysis (Study 2, N = 56,666) to assess how reality, mis-, and disinformation are constructed by politicians in Austria, Germany, and the Netherlands. The findings point to an affinity between populism and disinformation: Right-wing populist politicians take issue ownership in discrediting established knowledge and attempt to create momentum for alternative realities that resonate with populist worldviews. Such discourses of (un)truthfulness may have an important impact on defining reality for voters.

在越来越分散的数字通信环境中，（政治）信息的准确性和诚实性已成为激烈辩论和党派攻击的主题。因此，错误和虚假信息的挑战不仅涉及信息本身的真实性，而且涉及将支持信息作为不真实或故意虚假的真实和不和谐信息的话语结构。本文归纳分析（非）真实性的话语（研究1，N  = 1,777），并使用自动内容分析（研究2，N） = 56,666），以评估奥地利，德国和荷兰的政客如何构造现实，错误和虚假信息。研究结果表明，民粹主义与虚假信息之间存在亲和力：右翼民粹主义政治家在抹黑既有知识的过程中占据了所有权，并试图为与民粹主义世界观产生共鸣的另类现实创造动力。这种（不真实）话语可能对为选民定义现实产生重要影响。