What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: Q(y) -> S_2(y). exists y: T_4(y) -> Q(y). forall y: S_2(y) -> T_4(y).
forall y: Q(y) -> T_4(y). exists y: T_4(y) -> S_2(y). exists y: S_2(y) -> Q(y).