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 <-> q_6. ~p_12. p_12 or q_2. q_2 -> q_6.
q_2 can be inferred via the disjunctive syllogism rule. p -> q_6 can be inferred via the biconditional elimination rule. q_6 -> p can be inferred via the biconditional elimination rule.