We suggest a new representation of defeasible entailment and specificity in the framework of default logic. The representation is based on augmenting the underlying classical language with the language of conditionals having its own (monotonic) internal logic. It is shown, in particular, that nonmonotonic inheritance reasoning can be naturally represented in this framework, and generalized to the full classical language.
Subjects: 3.3 Nonmonotonic Reasoning; 5. Common Sense Reasoning
Submitted: Jun 10, 2008