Moore's, On the Signification of Walls
Also open the link that is on the Article.
Do walls (such an ordinary thing) have a value for you?
If so, what's that value?
If walls have never had any value for you but now they do (having read Moore's article),
What's that value? Share with the class 1) your experience with walls, 2) what expressions do you know that have to do with walls, 3) how can we put together (relate) Moore's article with that of Abbott?