The essay To negotiate truth is a cultural analytical study of the boundary work that takes place in the comment sections, more specifically in relations to the climate change debate and Greta Thunberg’s climate activism. This paper deals with empirical material in the form of comments obtained from the Swedish newspapers Aftonbladet’s and Expressen’s comment field on Facebook. The data-gathering method used for this paper is digital ethnography. This study aims to create an understanding of how argumentation is presented in open social arenas such as Expressen and Aftonbladet's comments field. The purpose of the study has been to show how the contested claims and facts are legitimized and negotiated in the comment fields. The theoretical framework has consisted of discourse theory and Boundary objects theory. The questions to be answered in the study is: In what way is truth constructed in the debate? How are the various claims of truth legitimized? In what way are facts and science used in the legitimization of the different claims of truths? The analysis shows that truth is constructed in many different ways, partly through what i choose to call denial and distrust discourse. The analysis also showed how climate research and the climate can be seen as a boundary object and be used to stabilize the denial discourse further. The result also showed that scientific evidence can be used in a variety of ways in the legitimization of the different claims of truth. On the one hand, there is a demand for more nuanced research to be presented in the media, this creates an image that there are two sides of climate science that are of equal importance. The analysis also showed how mistrust and doubt against established media, political processes and science in general can be used in the legitimization of various statements of truth. I also claim that Greta can be seen as a boundary object in the ongoing negotiation. The use of religious metaphors also proves to be of great importance in trying to undermine the climate issue and climate research in general.