1. A system for inference formation and defuzzification for use with a source of fuzzy variables, each of said fuzzy variables having a plurality of respective linguistic values associated therewith, said system comprising: knowledge-base memory means for generating a plurality of dimensional numbers corresponding to membership functions of said linguistic values for each fuzzy variable, said knowledge-base memory means comprising means for generating a first dimensional number indicating an area of a membership function and, a second dimensional number indicating a center of gravity of said membership function for each linguistic value of a fuzzy output variable; memory means for storing a weighting factor for each of said linguistic values; and arithmetic means, supplied with said dimensional numbers and said weighting factors, for mathematically operating on said dimensional numbers and said weighting factors to produce a crisp output signal from each fuzzy variable, said arithmetic means comprising means for multiplying said first dimensional number by a weighting factor for each linguistic value of a fuzzy output variable and summing all of said products to form an overall area, and means for conducting defuzzification according to the center of gravity method including means for producing a further product of said first dimensional number said second dimensional number for each linguistic value and said weighting factor for each linguistic value means for summing said second products to form an overall moment, and means for forming said crisp output value by forming the quotient of said Overall moment divided by said overall area.