In: Proceedings of the Sixth International Conference On Flexible Query Answering Systems (FQAS-04), Springer-Verlag LNAI 3055, pp. 203-216. c 2004 by Springer-Verlag. To model query answering, a question arises out of how the meaning of an user’s query is functional to get a valuable answer. In this paper, (1) we investigate the question within an existing peer-to-peer architecture for knowledge exchange—called KEx, (2) we extend the query answering functionality of KEx by a co-evolutive process based on the user’s preference information, (3) we model query answering as a language game.