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%0 Thesis %9 PhD Thesis %A Lowrance, John D. %T Dependency-Graph Models of Evidential Support %I Department of Computer and Information Science, University of Massachusetts, Amherst, MA %D 1982 %X Dependency-graph models of evidential support are formal systems capable of pooling and extending evidential information, while maintaining internal consistency. In this formalism, the likelihood of a proposition is represented as a subinterval of the until interval. The lower bound represents the degree of ``support'' provided a proposition by a body of evidence, and the upper bound represents the extent to which it remains ``plausible.'' The smaller this interval, the more precisely the probability of that proposition is known. Evidential information, extracted from the environment by (indivisible) sources of knowledge, enters these models in the form of probability

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