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. p <-> q_13. t_1.
~p and t_1 can be inferred via the conjunction rule. t_1 and ~p can be inferred via the conjunction rule. p -> q_13 can be inferred via the biconditional elimination rule. q_13 -> p can be inferred via the biconditional elimination rule. ~q_13 can be inferred via the biconditional elimination rule.