抄録
In a large-scale engineering project it is difficult for one engineer to cover any part in detail. Differences of background knowledge between engineers in each part of the design process can cause fatal failures. In this paper, such problems are inspected in terms of pragmatics and cognitive semantics. Through an analysis of the log in which experts and general public discussed a policy of Japanese atomic energy, it is discussed how differences of background knowledge affect the understanding of speaker's intension.
