Are you sure? That meaning wasn't obvious to me?

I often got this as an objection to utilitarianism, the other premise being that utilitarianism is impractical for humans. I've talked to lots of people about ethics since I took high school philosophy classes, study philosophy at university, and have engaged in more than a hundred online discussions about ethics. The objection actually isn't that bad if you steelman it, maybe people are trying to say that they, as humans, care about many other things and would be overwhelmed with utilitarian obligations. (But there remains the question whether they care terminally about these other things, or whether they would self-modify to a perfect utilitarian robot if given the chance.)

There could be further considerations that can be brought to bear. Just because something is claimed as axiomatic , doesn't mean the buck has actually stopped.

There could be in some cases, if people find out they didn't really believe their axiom after all. But it can just as well be that the starting assumptions really are axiomatic. I think that the idea that terminal values are hardwired in the human brain, and will converge if you just give an FAI good instructions to get them out, is mistaken. There are billions of different ways of doing the extrapolation, and they won't all output the same. At the end of the day, the buck does have to stop somewhere, and where else could that be than where a person, after long reflection and an understanding of what she is doing, concludes that x are her starting assumptions and that's it.

I don't quite agree with the prominent LW-opinion that human values are complex. What is complex are human moral intuitions. But no one is saying that you need to take every intuition into account equally. Humans are very peculiar sort of agents in mind space, when you ask most people what their goal is in life, they do not know or they give you an answer that they will take back as soon as you point out some counterintuitive implications of what they just said. I imagine that many AI-designs would be such that the AIs are always clearly aware of their goals, and thus feel no need to ever engage in genuine moral philosophy. Of course, people do have a utility-function in form of revealed preferences, what they would do if you placed them in all sorts of situations, but is that the thing we are interested in when we talk of terminal values? I don't think so! It should at least be on the table that some fraction of my brain's pandemonium of voices/intuitions is stronger than the other fractions, and that this fraction makes up what I consider the rational part of my brain and the core part of my moral self-identity, and that I would, upon reflection, self-modify to an efficient robot with simple values. Personally I would do this, and I don't think I'm missing anything that would imply that I'm making any sort of mistake. Therefore, the view that all human values are necessarily complex seems mistaken to me.

Having multiple epistemologies with equally good answers us something of a disaster.

These different epistemologies have a lot in common. The exercise would always be "define you starting assumptions, then see which moves are goal-tracking, and which ones aren't". Ethical thought experiments for instance, or distinguishing instrumental values from terminal ones, are things that you need to do either way if you think about what your goals are, e.g. how you would want to act in all possible decision-situations.

I still don't know what you think is bad about bad deontology.

• It is often vague and lets people get away with not thinking things through. It feels like they have an answer, but most people would have no clue how to set the parameters for an AI that implemented their type of deontology (e.g. when dilemma situations become probabilistic, which is, of course, all the time).

• It contains discussion stoppers like "rights", even though, when you taboo the term, that just means "harming is worse than not-helping", which is a weird way to draw a distinction, because when you're in pain, you primarily care about getting out of it and don't first ask what the reason for it was. Related: It gives the air of being "about the victim", but it's really more about the agent's own moral intuitions, and is thus, not really other-regarding/impartial at all. This would be ok if deontologists were aware of it, but they often aren't. They object to utilitarianism on the grounds of it being "inhumane", instead of "too altruistic".

In general, you need to make many fewer assumptions that what is obvious to you is obvious to everybody.

Yes, I see that now. I thought I was mainly preaching to the choir and didn't think the details of people's metaethical views would matter for the main thoughts in my original post. It felt to me like I was saying something at risk of being too trivial, but maybe I should have picked better examples. I agree that this comment does a good job at what I was trying to get at.