public void ComplexUnificationTest()
{
// !P(x,b,z,s) V ANS(f(g(z,b,h(x,z,s))))
var A = new Logic.MultipleOr(
new SkolemPredicateNode("P", true, VariableNode.Make<bool>(0, "x"), new FunctionNode("b"), VariableNode.Make<bool>(2,"z"), VariableNode.Make<bool>(3, "s")),
new SkolemPredicateNode("ANS", false,
new FunctionNode("f",
new FunctionNode("g",VariableNode.Make<bool>(2, "z"),new FunctionNode("b"),
new FunctionNode("h", VariableNode.Make<bool>(0, "x"), VariableNode.Make<bool>(2, "z"), VariableNode.Make<bool>(3, "s"))))));
// P(a,b,c,s0)
var B = new SkolemPredicateNode("P", false, new FunctionNode("a"), new FunctionNode("b"), new FunctionNode("c"), new FunctionNode("s0"));
Assert.AreEqual(UnificationService.CanUnificate((SkolemPredicateNode)A.Children[0], B), true);
var rules = UnificationService.GetUnificationRules((SkolemPredicateNode)A.Children[0], B);
Assert.AreEqual(rules.Count, 3);
UnificationService.Unificate(A, rules);
Assert.AreEqual(A.ToString(), "!P(a,b,c,s0) V ANS(f(g(c,b,h(a,c,s0))))");
}
public void UnificationTest()
{
// P(f(x), z)
var A = new SkolemPredicateNode("P", false, new FunctionNode("f", VariableNode.Make<bool>(0, "x")),
VariableNode.Make<bool>(2, "z"));
// P(y,a)
var B = new SkolemPredicateNode("P", false, VariableNode.Make<bool>(1, "y"), new FunctionNode("a"));
Assert.AreEqual(UnificationService.CanUnificate(A,B), true);
var rules = UnificationService.GetUnificationRules(A, B);
Assert.AreEqual(rules.Count, 2);
UnificationService.Unificate(A, rules);
UnificationService.Unificate(B, rules);
Assert.AreEqual(A.ToString(), "P(f(x),a)");
Assert.AreEqual(A.ToString(), B.ToString());
}