Four objects are depicted in the photograph, two black circles, a black ellipse and a blue panel on its side. They are in front of a grey painted background, which drops down to a horizon line where an expanse of warmer, yellower grey moves towards the viewer. This foreground proceeds as expected, containing the arrangement of objects until the flat circle unexpectedly disrupts the progression of linear space, facing us flatly, vertically within the picture plane. This is confusing because the circle immediately behind it is obeying spacial rules as we understand them — rules that we all previously agreed...