The Informational View of Technologies in the Scientific Practice Tomislav Karačić Abstract: How do people come to know things? This is the core question of this thesis that looks into the ways humans engage in their epistemic practices. The easy answer: With epistemic technologies. In this thesis, I argue that the notion of technology should be broadened to include our conceptual devices alongside our material culture. This has a profound consequence on our conception of logic and mathematics, here understood as conceptual technologies that shape our inferential practices. I rely on the insights from scientific and logico-mathematical practices to develop and defend the view put forth. Also, my aim is to show that the best framework to analyse the epistemic import of such technologies is that of the philosophy of information (PI). In light of this, I use the main PI’s method – levels of abstraction – to model the process of knowledge production, mainly in logic and mathematics. The upshot of this thesis is having a method for investigating the epistemic roles and values of conceptual (eg. negation, validity) and material (eg. microscope, telescope) tools in science. This can serve as a new framework for an empirical study of scientific and logico-mathematical practices.