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: w_3 -> q. q -> t. r -> w_3. ~t. p <-> r.
~q can be inferred via the modus tollens rule. w_3 -> t can be inferred via the transitivity rule. r -> q can be inferred via the transitivity rule. p -> r can be inferred via the biconditional elimination rule. r -> p can be inferred via the biconditional elimination rule.