What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_23: ~R_23(x_23). ~w_4. w_4 <-> q. t <-> R_23(a_23).
w_4 -> q. t -> R_23(a_23). q -> w_4. R_23(a_23) -> t. ~q.