**Talk given** at the LogiCIC Workshop 2016, Amsterdam

at Group Knowledge and Mathematical Collaboration 2017, Oxford, and

at Ampliative Reasoning in the Sciences 2017, Ghent.

**Abstract** The problem that motivates this paper is the following: Given a data-set with records of interactions from collaborative science online, which background-theory should be adopted to study these digital traces if one’s goal is to explain whether and how the collaboration was epistemically successful. I will approach this question on the basis of a specific case-study, namely the Polymath-projects initiated in 2009 by Cambridge mathematician and Field Medalist Timothy Gowers (see e.g. Allo et al. 2013). These are collaborative projects dedicated to specific research-level mathematical questions (finding a proof for a certain result). The centre of activity of these collaborations are interactions in discussion-threads on various weblogs, and the discussions in question are in principle open to anyone.

Extended abstract (LogiCIC-version)

Presentation (Oxford-version)

Presentation (Ghent-version)