You started with an intent to associate SIAI with self delusion

I see, he must be one of those innately evil enemies of ours, eh?

My current model of aaronsw is something like this: He's a fairly rational person who's a fan of Givewell. He's read about SI and thinks the singularity is woo, but he's self-skeptical enough to start reading SI's website. He finds a question in their FAQ where they fail to address points made by those who disagree, reinforcing the woo impression. At this point he could just say "yeah, they're woo like I thought". But he's heard they run a blog on rationality, so he makes a post pointing out the self-skepticism failure in case there's something he's missing.

The FAQ on the website is not the place to signal humility and argue against your own conclusions.

Why not? I think it's an excellent place to do that. Signalling humility and arguing against your own conclusions is a good way to be taken seriously.

Overall, I thought aaronsw's post had a much higher information to accusations ratio than your comment, for whatever that's worth. As criticism goes his is pretty polite and intelligent.

Also, aaronsw is not the first person I've seen on the internet complaining about lack of self-skepticism on LW, and I agree with him that it's something we could stand to work on. Or at least signalling self-skepticism; it's possible that we're already plenty self-skeptical and all we need to do is project typical self-skeptical attitudes.

For example, Eliezer Yudkowsky seems to think that the rational virtue of "humility" is about "taking specific actions in anticipation of your own errors", not actually acting humble. (Presumably self-skepticism counts as humility by this definition.) But I suspect that observing how humble someone seems is a typical way to gauge the degree to which they take specific actions in anticipation of their own errors. If this is the case, it's best for signalling purposes to actually act humble as well.

(I also suspect that acting humble makes it easier to publicly change your mind, since the status loss for doing so becomes lower. So that's another reason to actually act humble.)

(Yes, I'm aware that I don't always act humble. Unfortunately, acting humble by always using words like "I suspect" everywhere makes my comments harder to read and write. I'm not sure what the best solution to this is.)