We consider the computational complexity of evaluating nested counterfactuals over a propositional knowledge base. Counterfactual implication models a statement "if p, then q...
Developing a large belief network, like any large system, requires systems engineering to manage the design and construction process. We propose that network engineering follow a ...
Analysisof a corpus of queries to a statistical database has shown considerable variation in the location and order of modifiers in complex noun phrases. Nevertheless, restriction...
Fred Popowich, Paul McFetridge, Dan Fass, Gary Hal...
Existing explanation facilities are typically far more appropriate for knowledge engineers engaged in system maintenance than for endusers of the system. This is because the expla...
Every day, people widely use information retrieval (IR) systems to answer their questions. We utilized the TREC 2007 complex, interactive question answering (ciQA) track to measur...