Abstract
When they interact in everyday situations, people constantly create new fragments of social reality: they do so when they make promises or agreements, but also when they submit requests or answer questions, when they greet each other or express gratitude. This type of social reality ‘in the small,’ that we call interpersonal reality, is deontic in nature as all other kinds of social reality; what makes it somewhat special is that its deontology applies to the very same persons who create it through a process of intentional collaboration. Aim of this paper is to show that interpersonal reality can be accounted for in terms of a suitable concept of interpersonal responsibility. To this purpose we first discuss the deontology that is constitutive of interpersonal reality; then we show how such deontology can be entailed by relationships of interpersonal responsibility; and finally we argue that these relationships are created by executing suitable communicative acts, understood as actions performed with a reflexive communicative intention.