What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_8: R(x_8) -> Q_8(x_8). R(a_7). forall x_8: Q_8(x_8) -> R(x_8).
exists x: R(x). forall x_8: R(x_8) <-> Q_8(x_8). forall x_8: Q_8(x_8) <-> R(x_8).