Anyone who identifies as a rationalist is immediately suspect. The name itself is a bad joke. "Ah yes, let me name my philosophy 'obviously correctism'."
one is, "is there a rational description of the universe, the world, humanity, etc.". Some people think there isn't, but I would like to think that the universe does conform to some rational system.
the other, and important one is, "do humans have the capability to acquire and fully model this rational system in their own minds" and I don't think that's a given. the human brain is just an artifact of an evolutionary system that only implies that its owners can survive and persist on the earth as it happens to exist in the current 50K year period it occurs in. It's not clear that humans have even slight ability to be perfectly rational analytic engines, as opposed to unique animals responding to desires and fears. this is why it's so silly when "rationalists" try to appear as so above all the other lowly humans, as though escaping human nature is even an option.
not at all
> "Perfect rationality" sounds like "perfect knowledge", it's a mind-boggling concept belonging to a such a far distant future that we'll probably revise the concept away before we get anywhere near it.
my statement refers to a general vibe from people who call themselves "rationalists" are going on the assumption that they are rational, while everyone else is not. Which is ridiculous. everyone "tries" to be rational. of course everyone should "try" to be rational. That's what everyone is doing most of time regardless of how poorly we judge their success.
> Being slightly more rational is a practical goal, unless you're saying human nature won't allow even that much.
Everyone should be "slightly more rational". The rationalists state that they *are* more rational, and then they go on to have fixations on such "rational" things like proving that "race" is real and determines intelligence. Totally missing what their brains are actually doing since they are so "rational".
Other areas of human experience reveal the limits of rationality. In romantic love, for example, reason and rationality are rarely pathways to what is "obviously correct".
Rationality is one mode of human experience among many and has value in some areas more than others.
"Empiricism" is a term for philosophical movements (epitomized in early modern British Empiricists like Hume) that emphasized that truths are learned not by reasoning, but by learning from experience. So the matter is not "is rationality good?" but more: what is rationality or reason operating upon? Sense experiences? Or purely _a priori_, conceptual, or formal structures? The uncharitable gloss on rationalism is that rationalists hold that every substantive philosophical question can be answered while sitting in your armchair and thinking really hard.
For what it's worth, the modern rationalists are pro-empiricism with Yudkowsky including it as one of the 12 core virtues of rationality.
That said, I was surrounded by rationalists in my younger years by pure coincidence and spent some time following the blog links they sent and later reading the occasional LessWrong thread or SSC comment section that they were discussing each day in chat.
It's pretty easy to see that the movement attracts a lot of people who have made up their minds but use rationalisim as a way to build a scaffold underneath their pre-determined beliefs in a way that sounds correct. The blogs and forums celebrate writing of a certain style that feels correct and truthy. Anyone who learns how to write in that style can get their ideas accepted as fact in rationalist communities by writing that way. You can find examples throughout history where even the heroes of the rationalist movement have written illogical things, but they've done it in the correct way that makes it appear to be "first principals" thinking with a "steelmanning" of the other side along with appropriate prose to sound correct to rationalists.
I think it's very likely that people who can plausibly be considered "heroes of the rationalist movement" have written illogical things. But I don't know which specific people and which specific things you mean by that, so I don't know if I think you in particular are correct in your judgement or not.
Using first principles thinking and steelmanning are just rhetorical techniques for persuasive thinking and writing. Even people who are unfamiliar with those particular pieces of terminology do them.
https://parksandrecreation.fandom.com/wiki/The_Reasonabilist...
They are basically outing themselves as either having little curiosity, or as having had very limited opportunity to learn... Still if they expound on it, the curiosity deficit is the most likely explanation.