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_15: ~P_15(x_15) or R_15(x_15). forall x_15: W(x_15) and P(x_15). forall x_15: Q_15(x_15) -> U(x_15). exists x_15: R_15(x_15) -> U(x_15). forall x_15: P_15(x_15) or Q_15(x_15).
forall x_15: W(x_15) can be inferred via the universal simplification rule. forall x_15: P(x_15) can be inferred via the universal simplification rule. forall x_15: Q_15(x_15) or R_15(x_15) can be inferred via the universal resolution rule.