AIMA.Core.Logic.FOL.KB.FOLKnowledgeBase.indexFact C# (CSharp) Method

        private void indexFact(Literal fact)
        {
            String factKey = getFactKey(fact);
            if (!indexFacts.ContainsKey(factKey))
            {
                indexFacts.Add(factKey, new List<Literal>());
            }

            indexFacts[factKey].Add(fact);
        }