This article presents silence as a cognitive tool to comprehend the environment. Two dimensions of silence are addressed: a natural mechanism and human beings' social and cultural construction. There is a link between these two dimensions because, on the one hand, agents' cognitive strategies based on silence influence how meanings and uses of silence have been constructed. The meanings of silence we use are contextual shapers of silence-based cognitive strategies. Silence is analyzed as a resource for coping with ambiguity: situations (...) perceived as uncertain provoke doubt and confusion because they can be understood differently or suggest different interpretations. These situations can occur in the face of epistemic disruption. The consequence is a transfer of the ambiguity property of these situations to the usual ways of relating to the world and people. The cognitive approach is based here on a semiotic-hermeneutic interpretation of silence from a phenomenological perspective. This accounts for a paradox: even if silence does not exist (the world is acoustic), it is real. The silence experience is a non-inferential cognitive capacity located at the base of perception: a stimulus that suggests a particular gesture as an action different from the usual one to deal with the environment. (shrink)