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: u_3. ~p_16 or r_3. ~q_16 or p. p_16 or q_16. ~r_3.
u_3 and ~r_3 can be inferred via the conjunction rule. ~r_3 and u_3 can be inferred via the conjunction rule. q_16 or r_3 can be inferred via the resolution rule.