What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? p_16 <-> q_16. u -> w. u. q_2 -> q_16. ~p_16.
w. u and ~p_16. ~p_16 and u. p_16 -> q_16. q_16 -> p_16. ~q_16.