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: q_19. p. ~u. u or t_2.
t_2 can be inferred via the disjunctive syllogism rule. q_19 and p can be inferred via the conjunction rule. q_19 and ~u can be inferred via the conjunction rule. p and q_19 can be inferred via the conjunction rule. p and ~u can be inferred via the conjunction rule. ~u and q_19 can be inferred via the conjunction rule. ~u and p can be inferred via the conjunction rule.