What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: p_16 or u. w_1 <-> q. ~u. w_1 -> ~s. ~p_16 or s.
u or s can be inferred via the resolution rule. w_1 -> q can be inferred via the biconditional elimination rule. q -> w_1 can be inferred via the biconditional elimination rule.