Something is disappearing in this sequence, but what? Not the chair, because this isn’t a chair. Not even a picture of a chair, because the picture of a leg of a chair isn’t a chair. Is it a picture of a shadow of a chair that isn’t in the picture? If the picture at the top of this group is a picture of a shadow of a chair because the shadow is discernible, is the picture at the bottom not a picture of a shadow of a chair because it isn’t discernible to a person who hasn’t looked at the sequence of the shadow of the chair disappearing?
My first-grade school teacher, Millie, said that all questions are good questions, but I wonder if she was right.