a person who is a blind,deaf mute with no arms and no legs
the lady from the book "so much to tell you"
a person who is both a blind and deaf mute and also missing all limbs is preety useless in the sense that they cant do anything. they cant; read brail because they have no hands, see, hear or speak to anyone, walk as no legs are attached to their abdomen. The best they can do is to hold a cane in their mouth in hope that their wheelchair doesnt get munted into a wall and there cane be forced down their throat.