A NONNUMERIC APPROACH TO UNCERTAIN REASONING

This paper presents a non-numeric approach to uncertain reasoning by e xtending the incidence calculus. In parallel to the well known fuzzy, belief/plausibility, probability, and necessity/possibility measures, the corresponding classes of non-numeric Functions are examined. A met hod of constructing non-numeric functions is discussed using the notio n of compatibility relations. Non-numeric functions are used to interp ret uncertain reasoning by providing possible-worlds semantics for bot h qualitative and quantitative methods.