My sense is that this assertion can be empirically falsified for all levels of abstraction below “Do what is right.”
Indeed, this is one of many reasons why I am starting to think “go meta” is really, really good advice.
Edit: Clarification, what I mean is that I think virtue ethics, deontology, utilitarianism, and the less popular ethical theories agree way more than their proponents think they do. At this point this is still a guess.
The title of this post tempted me to make another article called “Eliezer apparently right about just about everything else” but I already tried that and it was a bad idea.