Earlier quoted context omitted.
The prevailing ideas (AKA Eliezer's ideas) do change. They used to be for AI research before they were against it. I am too bothered by the groupthink to hang around for long periods of time. I get enough of it IRL.
I'm pretty sure he's still for AI research, he just realized he'd been irresponsible about it. I'd much rather people change their mind as they gain greater understanding, as long as they document the reasoning.
Eliezer often cites a theorem from a mathematician that says that ideal rational agents can't disagree and applies it to normal conversation. In the LW circle this is used to bully people into conformity. No allowance is given for the time that it takes humans to think things through or negotiate on a set of priors based on their joint life experience. In practice at LW, it means that if you haven't conformed to a result that disturbs you within the course of a single conversation then you must be irrational. Because by Aumann's theorem rational agents will not remain in an undecided state.
They really are a bunch of borg.