What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? q_3 <-> s_4. forall y: ~R(y). R(j_3) <-> q_3.
q_3 -> s_4. R(j_3) -> q_3. s_4 -> q_3. q_3 -> R(j_3).