Lack of integration of the logic rule based approach with other approaches for deriving rules
in expert systems. For instance, genetic algorithms may be used to help identify variables
critical to decision making before applying the logic based rule induction approach. Alternatively,
a logic based rule induction approach can be applied to identify relationships between
subsets of existing information, and genetic algorithms can be used to find out which of the
rules would be robust in prediction and in validation (Mak & Blanning, 2003).