public void testDPLLReturnsFalseWhenOneClauseFalseInModel()
{
Model model = new Model();
model = model.extend(new Symbol("A"), true).extend(new Symbol("B"),
false);
Sentence sentence = (Sentence)parser.parse("((A OR B) AND (A => B))");
bool satisfiable = dpll.dpllSatisfiable(sentence, model);
Assert.AreEqual(false, satisfiable);
}