Impossible?

Not if you assume:

• People who are blind have a screen reader and/or a braille display,
• People who are deaf and blind have a braille display,
• People who are deaf have a visual display,
• People who have a muscular disability are able to use the keyboard or simulate it with another device,
• People with learning, reading, or cognitive disabilities have a visual display and possibly a screen reader,
• People with low vision can magnify the visual display.