Models as Mediators, edited by Mary Morgan and Margaret Morrison (so many Ms!), is a collective book from 1999 that has now become kind of a classic for whoever is interested in modelling activities in science. It played an important role in impulsing a trend in philosophy of science that consists in focusing more on modelling activities, considered scientifically important for their own sake, and less on the content of abstract theories (a trend that arguably started earlier, in particular with Nancy Cartwright’s work, who contributed to the book, and also perhaps even earlier with Mary Hesse, cited in the introduction). This book is somehow relevant for my project of discussing how a pragmatic conception of theories could fare better than a semantic conception, because, as we will see, it opposes, or at least attempts to supersede the semantic conception of theories in some respects. However, it is also partly irrelevant to my project, because my main focus is still on abstract ...