public double Defuzzificate(double xv, double fiv, DefuzzificationMethod method =
DefuzzificationMethod.GravityCentre)
{
double[] args = { xv, fiv };
double min = premise.GetConfidence(args);
FuzzySet result = new FuzzySet((x) => Math.Min(teta.GetConfidence(x), min),
teta.XMin[0], teta.XMax[0]);
return(result.Defuzzification(method));
}