What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? T_4(b) -> q. forall x_4: T_4(x_4) -> R_2(x_4). forall x_4: R_2(x_4) -> T_4(x_4).
forall x_4: T_4(x_4) <-> R_2(x_4). forall x_4: R_2(x_4) <-> T_4(x_4).