Historically, we have dismissed very obviously sapient people as lacking moral worth (people with various mental illnesses and disabilities, and even the freaking Deaf). Since babies are going to have whatever-makes-them-people at some point, it may be more likely that they already have it and we don’t notice, rather than they haven’t yet. That’s why I’m a lot iffier about killing babies and mentally disabled humans than pigs.
Historically, we have dismissed very obviously sapient people as lacking moral worth (people with various mental illnesses and disabilities, and even the freaking Deaf). Since babies are going to have whatever-makes-them-people at some point, it may be more likely that they already have it and we don’t notice, rather than they haven’t yet. That’s why I’m a lot iffier about killing babies and mentally disabled humans than pigs.