"Fundamental reality" doesn't have a perspective, so it seems weird to draw the lines there. Rather, there's a fact about what's prime, and the pebblesorters care about that, and there's a fact about what's right, and humans care about that. We can be mistaken about what's right, and we can have disagreements about what's right, and we can change our minds. And given time and progress, we will hopefully get closer to understanding what's right. And if the pebblesorters claim that they care about what's right rather than what's prime, they're factually incorrect.
"Fundamental reality" doesn't have a perspective, so it seems weird to draw the lines there.
Of course — I was just doing my best to imagine the mindset of a non-religious person who believes in an objectively objective morality (i.e. that even in the absence of a deity, the universe still somehow imposes moral laws). Admittedly, I don't encounter too many of those (people who think they've devised universally compelling moral arguments are more common; even big-O Objectivists seem to just be an overconfident version of that), but I do still me...
Less Wrong is extremely intimidating to newcomers and as pointed out by Academian something that would help is a document in FAQ form intended for newcomers. Later we can decide how to best deliver that document to new Less Wrongers, but for now we can edit the existing (narrow) FAQ to make the site less scary and the standards more evident.
Go ahead and make bold edits to the FAQ wiki page or use this post to discuss possible FAQs and answers in agonizing detail.