What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: P_12(x_12) -> ~Q_12(x_12). forall x_12: Q_12(x_12). P_12(a_10) <-> q.
P_12(a_10) -> q. q -> P_12(a_10). forall x_12: ~P_12(x_12).