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: ~q_10. q_10 -> p_10. p_10 -> q_10.
~p_10 can be inferred via the modus tollens rule. q_10 <-> p_10 can be inferred via the biconditional introduction rule. p_10 <-> q_10 can be inferred via the biconditional introduction rule.