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_10. t_4. p_10 -> q. q -> p_10.
~q can be inferred via the modus tollens rule. ~p_10 and t_4 can be inferred via the conjunction rule. t_4 and ~p_10 can be inferred via the conjunction rule. p_10 <-> q can be inferred via the biconditional introduction rule. q <-> p_10 can be inferred via the biconditional introduction rule.