What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~t. ~q_17. p_8 <-> t. r <-> q_17.
~t and ~q_17. ~q_17 and ~t. p_8 -> t. r -> q_17. t -> p_8. q_17 -> r. ~p_8. ~r.