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%common.sli[e89,jmc]	The common sense informatic situation
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\centerline{THE COMMON SENSE INFORMATIC SITUATION}
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\itemb There are no {\it a priori} bounds on what is relevant.

\itemb Kinds of objects can be identified and related but not defined.

\itemb Must prefer simplest or most standard model of known facts.

\itemb Nonmonotonic reasoning must be redone when new relevant facts arrive.

\itemb Objects considered often have only an approximate meaning.

\itemb Situations and objects are considered at different levels of detail.

\itemb Contexts and their relations must be considered.

\itemb Quantitative information is only partially available.

\itemb Quantitative computation is often infeasible.

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