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