Mary's Grey Room
Does Mary learn something new?
Level 1 · 5 / 10
Mary's Grey Room
Mary has spent her whole life in a room with no colour in it. Everything is black, white or grey, including her screens and her skin. But she's the world's leading expert on colour vision. She knows every wavelength, every nerve, every last fact about what happens in a brain when it sees red. One day the door opens and she walks out into a garden of roses.
Does Mary learn something new?
Then ask
- If she does, what is it exactly — say it in a sentence.
- Could you explain what a smell is like to someone who's never smelled anything?
- Would she recognise red on sight, or have to be told?
The classics and some new ones. A scenario, the question it forces, and the follow-ups that make it bite.