Harry Collins is Distinguished Research Professor at Cardiff University, UK. He is an elected Fellow of the British Academy and winner of the Bernal prize for social studies of science. His c25 books cover, among other things, sociology of scientific knowledge, artificial intelligence, the nature of expertise, tacit knowledge, and technology in sport.Robert Evans is Professor of Sociology in the School of Social Sciences at Cardiff University, UK. He has worked in the field of science and technology studies for over 20 years, with research projects including sustainable energy, medical genetics and economic forecasting. His work is most closely associated with the ‘Third Wave of Science Studies’, including Rethinking Expertise (2007) and Why Democracies Need Science (2017), both of which were co-authored with Professor Harry Collins, and developing the closely related Imitation Game method.Darrin Durant is Lecturer in Science and Technology Studies at the University of Melbourne, Australia. He has published widely on democratic deliberations about nuclear waste disposal, the politics of climate change, contemporary post-truth dynamics, and the role experts can and should play in liberal democracies.Martin Weinel is Research Associate at the Cardiff School of Social Sciences at Cardiff University, UK. In collaboration with others, most notably Harry Collins, Rob Evans and Nicky Priaulx, he has written on aspects of expertise, science policy, interdisciplinarity, science communication and the Imitation Game.