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_12: Q_11(x_12) -> R_8(x_12). forall x_12: ~P_11(x_12) or R_11(x_12). exists x_12: R_11(x_12) -> R_8(x_12). forall x_12: P_12(x_12) -> U(x_12). forall x_12: P_12(x_12). forall x_12: P_11(x_12) or Q_11(x_12).
forall x_12: U(x_12) can be inferred via the universal modus ponens rule. forall x_12: Q_11(x_12) or R_11(x_12) can be inferred via the universal resolution rule.