What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_4: U(y_4) <-> Q(y_4). forall y_4: T(y_4) or ~U(y_4). exists y_4: W_2(y_4) -> Q(y_4).
forall y_4: U(y_4) -> T(y_4). forall y_4: U(y_4) -> Q(y_4). forall y_4: Q(y_4) -> U(y_4).