What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists y_3: S(y_3) -> ~U_4(y_3). forall y_3: S(y_3) <-> T_1(y_3). forall y_3: U_4(y_3).
exists y_3: ~S(y_3). forall y_3: S(y_3) -> T_1(y_3). forall y_3: T_1(y_3) -> S(y_3).