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: ~t_2. t_2 or q_13. ~p. p <-> q_7.
q_13 can be inferred via the disjunctive syllogism rule. ~t_2 and ~p can be inferred via the conjunction rule. ~p and ~t_2 can be inferred via the conjunction rule. p -> q_7 can be inferred via the biconditional elimination rule. q_7 -> p can be inferred via the biconditional elimination rule. ~q_7 can be inferred via the biconditional elimination rule.