AIMA.Core.Logic.Propositional.Visitors.SymbolClassifier.getImpureSymbolsIn C# (CSharp) Method

        public List<Symbol> getImpureSymbolsIn(Sentence sentence)
        {
            List<Symbol> allNegatives = getNegativeSymbolsIn(sentence);
            List<Symbol> allPositives = getPositiveSymbolsIn(sentence);
            return SetOps.intersection(allPositives, allNegatives);
        }