Credibility Discounting in the Theory of Approximate Reasoning
  We are concerned with the problem of introducing credibility type information
into reasoning systems. The concept of credibility allows us to discount
information provided by agents. An important characteristic of this kind of
procedure is that a complete lack of credibility rather than resulting in the
negation of the information provided results in the nullification of the
information provided. We suggest a representational scheme for credibility
qualification in the theory of approximate reasoning. We discuss the concept of
relative credibility. By this idea we mean to indicate situations in which the
credibility of a piece of evidence is determined by its compatibility with
higher priority evidence. This situation leads to structures very much in the
spirit of nonmonotonic reasoning.
