A representation of approximate reasoning with analogy

A scheme of approximate reasoning with analogical inference is proposed for purpose of flexible inference. This method uses truth value [0,1] based on possibility and assigns a truth value called certainty factor (cf) ∈[0,1] to the implication A→B. This inference conclusion is derived as a product of the truth value T(A) of the fact A and certainty factor cf. A scheme of analogical inference based on the concept `similar causes lead similar results´ is also introduced. This analogical inference can be done by using a degree of equivalence as a similarity between statements. The new combination rule of conclusions, which derives the supremum and the infimum of a certainty factor and determines a meaningful value by using those bounds, is described. It is clarified that the scheme can derive the inference result that is in accord with human intuition