No Moral Code
I use logic to advocate animal rights. But I was unable to give a logical objection against total rejection of ethics. Every argument for animal rights is based on assumption that one cares about ethics and moral values. But what if someone accepts to be "evil" and is totally insensitive about suffering of others, even humans? Is there a logical argument against evil?
If someone actually believed that there should be no moral code:
1. Don't turn your back
2. If they turn their back, hit them over their head and take their wallet. If they complain, they were not serious about believing might makes right.