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Hector Geffner

Hector Geffner is Research Staff Member at IBM's T. J. Watson Research Center. He received his doctoral degree from the University of California, Los Angeles.

Titles by This Author

Causal and Conditional Theories

Defaults in commonsense reasoning permit the generation of useful predictions in the absence of complete information. However, attempts to represent and reason with defaults in Al run into the problem of spurious arguments, arguments that rely on acceptable defaults but which support unacceptable conclusions. Geffner addresses this problem by analyzing the causal and conditional aspects of default, establishing clear theoretical limits on the capabilities of probabilistic approaches.