What I'm saying is that in the physical world there are only causes and effects, and the primeness of a heap of pebbles is not an ontologically basic fact operating as a separate and additional element of physical reality, but it is nonetheless about as "intrinsic" to the heap of pebbles as anything.
Once morality stops being mysterious and you start cashing it out as a logical function, the moral awfulness of a murder is exactly as intrinsic as the primeness of a heap of pebbles. Just as we don't care whether pebble heaps are prime or experience any affect associated with its primeness, the Pebblesorters don't care or compute whether a murder is morally awful; and this doesn't mean that a heap of five pebbles isn't really prime or that primeness is arbitrary, nor yet that on the "moral Twin Earth" murder could be a good thing. And there are no little physical primons associated with the pebble-heap that could be replaced by compositons to make it composite without changing the number of pebbles; and no physical stone tablet on which morality is written that could be rechiseled to make murder good without changing the circumstances of the murder; but if you're looking for those you're looking in the wrong closet.
In You Provably Can't Trust Yourself, Eliezer tried to figured out why his audience didn't understand his meta-ethics sequence even after they had followed him through philosophy of language and quantum physics. Meta-ethics is my specialty, and I can't figure out what Eliezer's meta-ethical position is. And at least at this point, professionals like Robin Hanson and Toby Ord couldn't figure it out, either.
Part of the problem is that because Eliezer has gotten little value from professional philosophy, he writes about morality in a highly idiosyncratic way, using terms that would require reading hundreds of posts to understand. I might understand Eliezer's meta-ethics better if he would just cough up his positions on standard meta-ethical debates like cognitivism, motivation, the sources of normativity, moral epistemology, and so on. Nick Beckstead recently told me he thinks Eliezer's meta-ethical views are similar to those of Michael Smith, but I'm not seeing it.
If you think you can help me (and others) understand Eliezer's meta-ethical theory, please leave a comment!
Update: This comment by Richard Chappell made sense of Eliezer's meta-ethics for me.