Peter Weingart and Lars Guenther suggest that the public's trust in science has become endangered due to a new ecology of science communication. An implicit theoretical base of their argument is that the integrity of science as an institution depends on the integrity of science as a profession. My comment aims to reconstruct and question this specific institutional understanding of science. I argue that rust in technologies of knowledge production might be a potential equivalent to trust in professions.

Citizen Science is part of a broader reconfiguration of the relationship between science and the public in the digital age: Knowledge production and the reception of scientific knowledge are becoming increasingly socially inclusive. We argue that the digital revolution brings the "problem of extension" — identified by Collins and Evans in the context of science and technology governance — now closer to the core of scientific practice. In order to grasp the implications of the inclusion of non-experts in science, the aim of this contribution is to define a role-set of non-certified knowledge production and reception, serving as a heuristic instrument for empirical clarifications.