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_3 -> ~t. ~q_4. p_17 <-> q_4. t.
~p_3 can be inferred via the modus tollens rule. ~q_4 and t can be inferred via the conjunction rule. t and ~q_4 can be inferred via the conjunction rule. p_17 -> q_4 can be inferred via the biconditional elimination rule. q_4 -> p_17 can be inferred via the biconditional elimination rule. ~p_17 can be inferred via the biconditional elimination rule.