What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: U_4(x_12) -> S_3(x_12). forall x_12: Q_12(x_12) -> S_3(x_12). forall x_12: S_3(x_12) -> Q_12(x_12). exists x_12: S_3(x_12) -> U_4(x_12).
forall x_12: U_4(x_12) -> Q_12(x_12). exists x_12: Q_12(x_12) -> U_4(x_12). forall x_12: Q_12(x_12) <-> S_3(x_12). forall x_12: S_3(x_12) <-> Q_12(x_12). exists x_12: S_3(x_12) <-> U_4(x_12). exists x_12: U_4(x_12) <-> S_3(x_12).