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: t_2. w <-> q_7. ~w.
t_2 and ~w can be inferred via the conjunction rule. ~w and t_2 can be inferred via the conjunction rule. w -> q_7 can be inferred via the biconditional elimination rule. q_7 -> w can be inferred via the biconditional elimination rule. ~q_7 can be inferred via the biconditional elimination rule.