What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_13: S_4(x_13) -> R(x_13). forall x_13: ~T(x_13). forall x_13: S_4(x_13) <-> U(x_13). forall x_13: U(x_13) -> T(x_13). forall x_13: R(x_13) <-> S_4(x_13).
forall x_13: ~U(x_13). forall x_13: S_4(x_13) -> U(x_13). forall x_13: R(x_13) -> S_4(x_13). forall x_13: U(x_13) -> S_4(x_13). forall x_13: S_4(x_13) -> R(x_13).