What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_16: P_2(x_16). forall x_16: P_2(x_16) <-> U_1(x_16).
forall x_16: P_2(x_16) -> U_1(x_16). forall x_16: U_1(x_16) -> P_2(x_16).