public void testPLResolveWithOneLiteralSentencesMatching()
{
Sentence one = (Sentence)parser.parse("A");
Sentence two = (Sentence)parser.parse("(NOT A)");
// Sentence expected =(Sentence) parser.parse("(A OR C)");
List<Sentence> resolvents = resolution.plResolve(one, two);
Assert.AreEqual(1, resolvents.Count);
Assert.IsTrue(resolvents.Contains(new Symbol("EMPTY_CLAUSE")));
}