Think you of the fact that a deaf person cannot hear. Then, what deafness may we not all possess? What senses do we lack that we cannot see and cannot hear another world all around us? ↗
The plain man is familiar with blindness and deafness, and knows from his everyday experience that the look of things is influenced by his senses; but it never occurs to him to regard the whole world as the creation of his senses. ↗
On the other hand, there are only so many people who really knew how she was exactly, like what did her accent sound like, and the fact that she developed profound deafness when she was first running the Harriet Lane. ↗