ACM Transactions on Computational Logic
Reiter's original definition of default logic allows for the application of a default that contradicts a previously applied one. We call this condition failure. The possibility of generating failures has been in the past considered as a semantical problem, and variants have been proposed to solve it. We show that it is instead a computational feature that is needed to encode some domains into default logic.
@article{libe-06-b, title = {Where Fail-Safe Default Logics Fail}, year = {2007}, author = {Liberatore, Paolo}, journal = {ACM Transactions on Computational Logic}, number = {2}, volume = {8}, }HTTP download.