What experts deny, novices must understand

Abstract

We consider the problem of representing the denial of default information. We show that such denials are important parts of commonsense reasoning. Moreover, their representation is not a simple matter of negating traditional representations of default information. We have found a solution by separating default information into use and trend portions. This approach may also afford a more compact way to represent defaults in general. (Also cross-referenced as UMIACS-TR-94-64)