Uncertainty and Conflict Handling in the ATT-Meta Context-Based System for Metaphorical Reasoning

At CONTEXT'99, the author described the ATT-Meta context-based system for (a) reasoning uncertainly about agents' beliefs and (b) performing some of the uncertain reasoning needed for the understanding of metaphorical language. ATT-Meta's handling of uncertainty is qualitative, and includes provisions for adjudicating conflicts between different lines of reasoning. But most of the detail on conflict-handling given in the earlier paper concerned conflicts arising for the special requirements of (a). Furthermore, there have been major recent changes in the conflict-handling approach. The present paper provides a detailed account of major parts of the current approach, stressing how it operates in metaphorical reasoning. In concentrating on uncertainty-handling, this paper does not seek to repeat the justifications given elsewhere for ATTMeta's approach to metaphor.