What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x: U_1(x) or ~U(x). forall x: Q(x) -> ~U_1(x). exists x: W_1(x) -> U_1(x). forall x: U(x) or W_1(x).
forall x: U(x) -> U_1(x) can be inferred via the universal rewriting rule.