What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_5: U_1(x_5) -> P_5(x_5). forall x_5: P_5(x_5) <-> U_1(x_5).
forall x_5: P_5(x_5) -> U_1(x_5). forall x_5: U_1(x_5) -> P_5(x_5).