What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_8: Q_8(x_8) -> R(x_8). forall x_8: R(x_8) -> Q_8(x_8). ~w. R(e_4) <-> w.
R(e_4) -> w. w -> R(e_4). ~R(e_4). forall x_8: Q_8(x_8) <-> R(x_8). forall x_8: R(x_8) <-> Q_8(x_8).