What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_25: P_25(x_25) <-> Q_25(x_25). forall x_25: P_25(x_25). forall y: Q_2(y).
forall x_25: P_25(x_25) -> Q_25(x_25). forall x_25: Q_25(x_25) -> P_25(x_25).