virtue of collective agreement. What I mean by that is ... We're talking here, for example, about grief and that animals, non-human animals feel grief and so on. Non-human animals feel loss, for sure. I think there's no question that that's the case, and they suffer. I think there's no question that's the case, but research on emotion suggests pretty clearly that there is no inherent emotional meaning in any set of physical signals that occur from your body. What we do is ... humans, is we learn to impose meanings on those signals, right?