The document discusses different moral theories and their implications for determining the moral status of animals and humans. Utilitarian approaches that consider pleasure and pain tend to include animals in moral calculations, while Kantian views focusing on rationality assign non-humans less worth. This raises questions about how these theories apply to humans with reduced rationality, such as those with brain damage or dementia. The document questions what criterion should determine moral status for animals and humans, and whether there is a way to argue that humans have greater value without also implying that some humans have less value than others.