What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? p -> q_7. p_12 <-> q_12. ~p_12. q_12 <-> q_7.
p_12 -> q_12. q_12 -> q_7. q_12 -> p_12. q_7 -> q_12. ~q_12.