Abstract
Communication is a basis of social ability in human. It is an exchange of information among multiple entities, and within this, ambiguity has been thought to be unnecessary for communication. This paper proposed a hypothesis that ambiguity is included in interpersonal communication and that it plays a critical role, not only in one-to-one relationship but also in a large scale social group. In order to test this hypothesis, we conducted one simulation study and two behavioral experiments. In the paper we showed the detail evidences supporting the hypothesis and discussed about a neural mechanism for disambiguating process in communication ability.
