Susan H. Busch, Ph.D. The Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, CT; The Center for Nicotine and Tobacco Use Research at Yale Tracy A. Falba, Ph.D. The Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, CT; The Center for Nicotine and Tobacco Use Research at Yale Noelia Duchovny, Ph.D. The Department...

We distinguish between two ways of thinking about defaults. The rst way, in which defaults augment known premises by`strengthening' the underlying logic, is the traditional approach taken by most existing formalisms. In the second way, defaults are represented in the set of premises, but obtain their default status by having a reduced priority relative to the known premises. In this paper we: 1...

1 Yale School of Medicine, New Haven, CT, United States, 2 Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT, United States, 3 Yale Cancer Center, Yale School of Medicine, New Haven, CT, United States, 4 University of Connecticut School of Medicine, Farmington, CT, United States, 5 Department of Biostatistics, Yale School of Public Health, New Haven, CT, United States,...

A rational agent (artificial or otherwise) residing in a complex changing environment must gather information perceptually, update that information as the world changes, and combine that information with causal information to reason about the changing world. Using the system of defeasible reasoning that is incorporated into the OSCAR architecture for rational agents (Pollock 1995 and 1995a), a ...

Belief update and reasoning about actions are two well studied areas of research about the evolution of knowledge over time. The similarities between these two fields have already been pointed out by some researchers: for example del Val and Shoham [4] use a theory of action to derive a semantics for belief update; Li and Pereira [8] use a Ginsberg-like semantics for updating a theory of action...

1 Department of Psychiatry, Yale School of Medicine, Yale University, New Haven, CT, USA 2 Child Study Center, Yale School of Medicine, Yale University, New Haven, CT, USA 3 Department of Neurobiology, Yale School of Medicine, Yale University, New Haven, CT, USA 4 The Mind Research Network, Albuquerque, NM, USA 5 Department of Electrical and Computer Engineering, The University of New Mexico, A...