9. An apparatus, which has a first memory area and a second memory area, for rearranging a plurality of fuzzy reasoning rules stored in said first memory area, each of the rules comprising an antecedent, including at least one antecedent proposition, and a consequent, comprising: grouping means for extracting an antecedent proposition, from said rules stored in said first memory area, which has the highest frequency of appearance in said rules stored in said first memory area, and forming one group of rules consisting of those rules stored in said first memory area which have the extracted antecedent proposition in common; first storing means which, if said one group of rules contains a rule in which an antecedent has only the extracted antecedent proposition, stores that rule in said second memory area, and excludes that rule from said one group of rules; sub-grouping means for extracting an antecedent proposition having the next highest frequency of appearance from among the rules remaining in said one group of rules, and forming a sub-group of rules consisting of rules which have said antecedent proposition having the next highest frequency of appearance in common; second storing means for storing the rules in said second memory area in an order of common antecedent propositions having the highest frequency of appearance in an order in which the common antecedent propositions are included in larger proportion, by repeating the processing executed by said first storing means and said sub-grouping means with regard to said sub-group of rules; and control means which, after the processing performed by said grouping means, first storing means, sub-grouping means and second storing means has been completed with respect to said one group of rules, causes the processing on the remaining rules stored in said first memory, from which the rules contained in said first group of rules have been eliminated, performed by said grouping means, first storing means, sub-grouping means and second storing means, to be repeated until all rules stored in said first memory area are eliminated.
9. An apparatus, which has a first memory area and a second memory area, for rearranging a plurality of fuzzy reasoning rules stored in said first memory area, each of the rules comprising an antecedent, including at least one antecedent proposition, and a consequent, comprising: grouping means for extracting an antecedent proposition, from said rules stored in said first memory area, which has the highest frequency of appearance in said rules stored in said first memory area, and forming one group of rules consisting of those rules stored in said first memory area which have the extracted antecedent proposition in common; first storing means which, if said one group of rules contains a rule in which an antecedent has only the extracted antecedent proposition, stores that rule in said second memory area, and excludes that rule from said one group of rules; sub-grouping means for extracting an antecedent proposition having the next highest frequency of appearance from among the rules remaining in said one group of rules, and forming a sub-group of rules consisting of rules which have said antecedent proposition having the next highest frequency of appearance in common; second storing means for storing the rules in said second memory area in an order of common antecedent propositions having the highest frequency of appearance in an order in which the common antecedent propositions are included in larger proportion, by repeating the processing executed by said first storing means and said sub-grouping means with regard to said sub-group of rules; and control means which, after the processing performed by said grouping means, first storing means, sub-grouping means and second storing means has been completed with respect to said one group of rules, causes the processing on the remaining rules stored in said first memory, from which the rules contained in said first group of rules have been eliminated, performed by said grouping means, first storing means, sub-grouping means and second storing means, to be repeated until all rules stored in said first memory area are eliminated. 10. The apparatus according to claim 9, wherein said first and second storing means includes first and said second coding means, respectively, each of said first and second coding means coding the rule and storing the coded rule in said second memory area.