Mariarosaria Taddeo

In this paper, I offer a contribution to the debate on testimony that rests on three elements: the definition of semantic information, the analysis of trust as a second?order property of first?order relations, and Floridi?s Network Theory of Account (NTA). I argue that testimony transmits semantic information and it is neither grounded on trust nor justified by it. Instead, I show that testimony is an occurrence of a first?order relation of communication affected by the second?order property of trust. I then defend the view that an epistemic agent can acquire some knowledge, on the basis of the information communicated through testimony, if and only if the agent is able to connect the transmitted information to the conceptual network of interrelation to which it belongs. I refer to Floridi?s NTA to show how such a network allows the epistemic agent to achieve knowledge on the basis of semantic information

The use of tools and artefacts is a distinctive and problematic phenomenon in the history of humanity, and as such it has been a topic of discussion since the beginning of Western culture, from the myths of the Ancient Greek through Humanism and Romanticism to Heidegger. Several questionable aspects have been brought to the fore: the relation between technology and arts, the effects of the use of technology both on the world and on the user and the nature of the trust that users place in technology . This last topic is the subject of this special issue, which has the twofold goal of fostering a cross-disciplinary debate and, in doing so, of overcoming, at least in part, the fragmentation of the literature on this topic.The problematic nature of trust in technology becomes evident with the dissemination of information and communication technologies and the subsequent information revolution, with which artefacts cease to be used mainly to perform physical and fatigui ..