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: forall z_4: T(z_4) <-> P(z_4). forall z_4: T(z_4) -> P(z_4). ~P(e).
forall z_4: T(z_4) -> P(z_4) can be inferred via the universal biconditional elimination rule. forall z_4: P(z_4) -> T(z_4) can be inferred via the universal biconditional elimination rule.