Many-worlds is a clearly explicable interpretation of quantum mechanics and dramatically simpler than the Copenhagen interpretation revered in the mainstream. It rules out a lot of the abnormal conclusions that people draw from Copenhagen, e.g. ascribing mystical powers to consciousness, senses, or instruments. It is true enough to use as a model for what goes on in the world; but it is not true enough to lead us to any abnormal beliefs about, e.g., morality, "quantum immortality", or "possible worlds" in the philosophers' sense.
Cryonics is worth developing. The whole technology does not exist yet; and ambitions to create it should not be mistaken for an existing technology. That said, as far as I can tell, people who advocate cryonic preservation aren't deluded about this.
Mainstream science is a social institution commonly mistaken for an epistemology. (We need both. Epistemologies, being abstractions, have a notorious inability to provide funding.) It is an imperfect social institution; reforms to it are likely to come from within, not by abolishing it and replacing it with some unspecified Bayesian upgrade. Reforms worth supporting include performing and publishing more replications of studies; open-access publishing; and registration of trials as a means to fight publication bias. Oh, and better training in probability, too, but everyone can use that. However, cursing "mainstream science" is a way to lose.
Consequentialism is the ground of morality; in a physical world, what else could be? However, human reasoning about morality is embodied in cognitive algorithms that focus on things like social rule-following and the cooperation of other agents. This is why it feels like deontological and virtue ethics have something going on. We kinda have to deal with those to get on with others.
I am not sure that my metaethics accord with Eliezer's, because I am not entirely sure what Eliezer's metaethics are. I have my own undeveloped crank theory of ethical claims as observations of symmetry among agents, which accords with Eliezer's comments on fairness and also Hofstadter's superrationality, so I'll give this a pass. It strikes me as deeply unfortunate that game theory came so recently in human history — surprise, it turns out the Golden Rule isn't "just" morality, it's also algebra.
The "people are crazy" maxim is a good warning against rationalization; but there are a lot of rationality-hacks to be found that exploit specific biases, cognitive shortcuts, and other areas of improvability in human reasoning. It's probably more useful as a warning against looking for complex explanations of social behaviors which arise from historical processes rather than reasoned ones.
Mainstream science [...]
I agree with everything you said here, but I didn't want to use so many words.
Edit, May 21, 2012: Read this comment by Yvain.
- Peter de Blanc
There's been a lot of talk here lately about how we need better contrarians. I don't agree. I think the Sequences got everything right and I agree with them completely. (This of course makes me a deranged, non-thinking, Eliezer-worshiping fanatic for whom the singularity is a substitute religion. Now that I have admitted this, you don't have to point it out a dozen times in the comments.) Even the controversial things, like:
There are two tiny notes of discord on which I disagree with Eliezer Yudkowsky. One is that I'm not so sure as he is that a rationalist is only made when a person breaks with the world and starts seeing everybody else as crazy, and two is that I don't share his objection to creating conscious entities in the form of an FAI or within an FAI. I could explain, but no one ever discusses these things, and they don't affect any important conclusions. I also think the sequences are badly-organized and you should just read them chronologically instead of trying to lump them into categories and sub-categories, but I digress.
Furthermore, I agree with every essay I've ever read by Yvain, I use "believe whatever gwern believes" as a heuristic/algorithm for generating true beliefs, and don't disagree with anything I've ever seen written by Vladimir Nesov, Kaj Sotala, Luke Muelhauser, komponisto, or even Wei Dai; policy debates should not appear one-sided, so it's good that they don't.
I write this because I'm feeling more and more lonely, in this regard. If you also stand by the sequences, feel free to say that. If you don't, feel free to say that too, but please don't substantiate it. I don't want this thread to be a low-level rehash of tired debates, though it will surely have some of that in spite of my sincerest wishes.
Holden Karnofsky said:
I can't understand this. How could the sequences not be relevant? Half of them were created when Eliezer was thinking about AI problems.
So I say this, hoping others will as well:
I stand by the sequences.
And with that, I tap out. I have found the answer, so I am leaving the conversation.
Even though I am not important here, I don't want you to interpret my silence from now on as indicating compliance.
After some degree of thought and nearly 200 comment replies on this article, I regret writing it. I was insufficiently careful, didn't think enough about how it might alter the social dynamics here, and didn't spend enough time clarifying, especially regarding the third bullet point. I also dearly hope that I have not entrenched anyone's positions, turning them into allied soldiers to be defended, especially not my own. I'm sorry.