public void testDefaultClauseSimplifier() { FOLDomain domain = new FOLDomain(); domain.addConstant("ZERO"); domain.addConstant("ONE"); domain.addPredicate("P"); domain.addFunction("Plus"); domain.addFunction("Power"); FOLParser parser = new FOLParser(domain); List<TermEquality> rewrites = new List<TermEquality>(); rewrites.Add((TermEquality)parser.parse("Plus(x, ZERO) = x")); rewrites.Add((TermEquality)parser.parse("Plus(ZERO, x) = x")); rewrites.Add((TermEquality)parser.parse("Power(x, ONE) = x")); rewrites.Add((TermEquality)parser.parse("Power(x, ZERO) = ONE")); DefaultClauseSimplifier simplifier = new DefaultClauseSimplifier( rewrites); Sentence s1 = parser .parse("((P(Plus(y,ZERO),Plus(ZERO,y)) OR P(Power(y, ONE),Power(y,ZERO))) OR P(Power(y,ZERO),Plus(y,ZERO)))"); CNFConverter cnfConverter = new CNFConverter(parser); CNF cnf = cnfConverter.convertToCNF(s1); Assert.AreEqual(1, cnf.getNumberOfClauses()); Clause simplified = simplifier.simplify(cnf.getConjunctionOfClauses() [0]); Assert.AreEqual("[P(y,y), P(y,ONE), P(ONE,y)]", simplified .ToString()); }