What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_8: W(x_8) <-> R_3(x_8). forall x_8: W(x_8) or S_4(x_8). exists x_8: Q_2(x_8) -> R_3(x_8). forall x_8: S_4(x_8) -> Q_2(x_8).
exists x_8: S_4(x_8) -> R_3(x_8). forall x_8: W(x_8) -> R_3(x_8). forall x_8: R_3(x_8) -> W(x_8).