What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? s -> q_8. t <-> s_2. q_8 -> s_2. ~t. s_2 -> s.
s -> s_2. q_8 -> s. s_2 -> q_8. t -> s_2. s_2 -> t. ~s_2.