Part of the issue here seems to be what the word "weird" means. It might have been better for Eliezer to simply taboo the term. There seem to be multiple different meanings at play here: 1) counter to our expectations 2) counter to our intuitions 3) normatively weird in some deep sense. Eliezer is using the word in some way like 3 whereas if one uses meaning 2 then the statement "QM is weird" becomes completely reasonable.
I think the point of the post is that you ought to work not only on your expectations, so that QM stops being weird-1, but also on your intuitions, so that QM stops being weird-2.
I thought it was reasonably clear from context that he was saying that if human intuitions say reality is weird, the intuitions are objectively wrong, and you would profit from learning to think in ways that mean you don't get reality being mis-tagged "weird."
Did you mean to say "weird-3" there, with the implication that experiencing something as weird-1 or weird-2 is equivalent to believing or alieving it to be weird-3?
This kind of thinking can just be an excuse for saying that reality shouldn't make any sense. That's not true. It will take a bit of mathematical training to get the right intuitions, but reality should make sense. It is possible to tell which of two theories is correct based on which one is simpler.
I don't accuse Eliezer of falling for this. His sequence makes it clear he understands this.
Also, one minor nitpick:
complex amplitude
Once you accept timeless physics, there are real-only solutions, and it's pretty much impossible to test if this universe uses complex ones. In other words, there is no evidence that the amplitude is anything other than real and it would be silly to assume it is.
Today's post, Think Like Reality was originally published on May 2, 2007. A summary (from the LW wiki):
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