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_3 -> w. t -> q_3. w -> t. ~w.
~q_3 can be inferred via the modus tollens rule. q_3 -> t can be inferred via the transitivity rule. t -> w can be inferred via the transitivity rule. w -> q_3 can be inferred via the transitivity rule.