In 1982 Frank Jackson imagined Mary, a brilliant scientist who knows every physical fact about colour but has spent her whole life in a black and white room. When she’s let out and sees red, does she learn something new? Jackson said yes. Years later he changed his mind.
How to play it
Teach Mary everything there is to know about red. Then open the door.
That’s the whole collection examined, every room. Now imagine doing this with your own life, for a year, with two people who come to know it well. That’s membership.