What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_13: Q_6(x_13) -> U_2(x_13). exists x_13: Q_2(x_13) <-> T(x_13). forall x_13: T(x_13) -> Q_6(x_13). forall x_13: U_2(x_13) -> Q_2(x_13).
forall x_13: Q_6(x_13) -> Q_2(x_13). forall x_13: T(x_13) -> U_2(x_13). exists x_13: Q_2(x_13) -> T(x_13). exists x_13: T(x_13) -> Q_2(x_13).