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