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. ~w_2. t -> p_3. p_3 -> w_2.
~p_3 can be inferred via the modus tollens rule. t -> w_2 can be inferred via the transitivity rule. p_3 <-> t can be inferred via the biconditional introduction rule. t <-> p_3 can be inferred via the biconditional introduction rule.