question: protected boolean [ ] testWRTZeroR ( Classifier classifier , Evaluation evaluation , Instances train , Instances test ) throws Exception { boolean [ ] result = new boolean [ 2 ] ; evaluation . evaluateModel ( classifier , test ) ; try { Classifier zeroR = new weka . classifiers . rules . ZeroR ( ) ; zeroR . buildClassifier ( train ) ; Evaluation zeroREval = new Evaluation ( train ) ; zeroREval . evaluateModel ( zeroR , test ) ; result [ 0 ] = Utils . grOrEq ( zeroREval . errorRate ( ) , evaluation . errorRate ( ) ) ; } catch ( Exception ex ) { throw new Error ( "Problem determining ZeroR performance: " + ex . getMessage ( ) ) ; } return result ; }
target:  Determine whether the scheme performs worse than ZeroR during testing