“…Our empirical material for this study is extracted from a database of a commercial social media data analytics company, Mohawk, which extensively harvests public Finnish social media discussion at a rate of approximately 500,000 new messages per day [Pöyry et al, 2018]. As our focus was on the forms of public expertise, we decided to focus on Twitter, which is known to be the most central social media platform for political discussion and acts of communication aiming to influence political processes and public discussions [see Marttila et al, 2016;Nelimarkka et al, 2020;Vainikka and Huhtamäki, 2015], or to challenge and criticize the authorities [Ojala, Pantti and Laaksonen, 2019]. Further, it has become an important arena for communicating science to wider audiences and creating more impact for research [e.g.…”