Exceptional Subclasses in Qualitative Probability
Abstract
System Z+ [Goldszmidt and Pearl, 1991, Goldszmidt, 1992] is a formalism for reasoning with normality defaults of the form "typically if phi then + (with strength cf)" where 6 is a positive integer. The system has a critical shortcoming in that it does not sanction inheritance across exceptional subclasses. In this paper we propose an extension to System Z+ that rectifies this shortcoming by extracting additional conditions between worlds from the defaults database. We show that the additional constraints do not change the notion of the consistency of a database. We also make comparisons with competing default reasoning systems.
Cite
Text
Tan. "Exceptional Subclasses in Qualitative Probability." Conference on Uncertainty in Artificial Intelligence, 1994. doi:10.1016/B978-1-55860-332-5.50075-4Markdown
[Tan. "Exceptional Subclasses in Qualitative Probability." Conference on Uncertainty in Artificial Intelligence, 1994.](https://mlanthology.org/uai/1994/tan1994uai-exceptional/) doi:10.1016/B978-1-55860-332-5.50075-4BibTeX
@inproceedings{tan1994uai-exceptional,
title = {{Exceptional Subclasses in Qualitative Probability}},
author = {Tan, Sek-Wah},
booktitle = {Conference on Uncertainty in Artificial Intelligence},
year = {1994},
pages = {553-559},
doi = {10.1016/B978-1-55860-332-5.50075-4},
url = {https://mlanthology.org/uai/1994/tan1994uai-exceptional/}
}