Miller, MichaelPerlis, DonWe 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)en-USTechnical Report