What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? q_4 <-> P(d). forall x_12: P(x_12) -> ~Q_12(x_12). forall x_12: Q_12(x_12).
q_4 -> P(d). P(d) -> q_4. forall x_12: ~P(x_12).