In many insects, they simply may be functionless vestigial structures. The simple fact that it is noncoding DNA does not establish that it is functionless. The position, however, was primarily contractual and it became progressively more of a functionless sinecure. Both functional and functionless symptoms are coherent, according to the client's own material. In some species, all the legs are functionless, apart from the front pair in males. NUMTs are not utterly functionless and certain functions are being associated with them.