What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_6: ~Q_6(x_6). r <-> P_6(a_5). forall x_6: P_6(x_6) -> Q_6(x_6).
r -> P_6(a_5). P_6(a_5) -> r. forall x_6: ~P_6(x_6).