What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_2: T(y_2) <-> T_3(y_2). exists y_2: T_3(y_2) or ~U(y_2). forall y_2: T(y_2) or U(y_2).
exists y_2: U(y_2) -> T_3(y_2). forall y_2: T(y_2) -> T_3(y_2). forall y_2: T_3(y_2) -> T(y_2).