Today's post, Is Morality Preference? was originally published on 05 July 2008. A summary (taken from the LW wiki):
A dialogue on the idea that morality is a subset of our desires.
Discuss the post here (rather than in the comments to the original post).
This post is part of the Rerunning the Sequences series, where we'll be going through Eliezer Yudkowsky's old posts in order so that people who are interested can (re-)read and discuss them. The previous post was Moral Complexities, and you can use the sequence_reruns tag or rss feed to follow the rest of the series.
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Without the assumption that shooting a child is immoral, this is not a moral argument. With that as an assumption, the moral component of the conclusion is assumed, not proven.
Find me the proof that shooting a child is immoral and we will be off to a good start.
If you're looking for a test of a moral claim that does not rely on any background assumptions about morality, then I agree that I can't give you an example. But that's because your standard is way too high. When we test scientific hypotheses, the evidence is always interpreted in the context of background assumptions. If it's kosher for scientific experiments to assume certain scientific facts (as they must), then why isn't it kosher for moral experiments to assume certain moral facts?
Consider the analog of your position in the descriptive case: someone d... (read more)