What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_8: P_8(x_8) or ~R(x_8). forall x_8: Q_1(x_8) -> R(x_8). forall x_8: P_8(x_8) -> R_1(x_8).
exists x_8: R(x_8) -> P_8(x_8).