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. w <-> t_2. ~w. p_8 <-> t_2.
q and ~w can be inferred via the conjunction rule. ~w and q can be inferred via the conjunction rule. w -> t_2 can be inferred via the biconditional elimination rule. p_8 -> t_2 can be inferred via the biconditional elimination rule. t_2 -> w can be inferred via the biconditional elimination rule. t_2 -> p_8 can be inferred via the biconditional elimination rule. ~t_2 can be inferred via the biconditional elimination rule.