> "even in this case where we don't necessarily have reason because it's useful,... that is still no reason (heh) to expect it to mislead us."

There are plenty of cases of reason misleading, going wrong, perhaps as many or more as reason going right. But of course, judgment of right and wrong depends on your criteria, and reason will never help you achieve that which is prior to reason: faith, in the most basic form.

But, in rationalist theory, by positing itself as the means and also the end (we use reason to get closer to reason; we have faith in reason), the term forms the sort of self-sustaining loop that Zizek (or really Lacan) calls a "master signifier", and is also the essence of all theology. All other considerations are shoved under the bus, or else dictated by a sort of bland evolutionary ethical theorizing, like "minimizing suffering", without really interrogating what that even means (if they looked into older philosophy, they would see that thought itself could be considered a form of suffering). It is not necessarily bad to hold to a master signifier as such, as all faith exists in this form, but the rationalists seem especially unaware or unable to interrogate their beliefs to this level.

> I am very leery of the notion of "hard truths", because it imbues an argument with value based on the emotional work performed in reasoning it out.

This is a misunderstanding of what I meant to express, and I apologize for using that term. In my experience (and in the psychoanalytic literature), "hard truths" are "hard" because they involve noticing objective aspects of ourselves that we were previously blind to. The recognition often comes in a flash, with a sense of relief, rather than through some sort of laborious process (of course, the preparation for that flash might well be a laborious process of re-learning how to look!). The "hard truth" is being able to admit something like "actually, I'm not just out to get the truth. I want social recognition after all."

> Something does not become more or less true by being hard to admit; an untruth can be as hard to admit as a truth

Such a focus on truth in relation to psychological affairs feels, to me, wrong-headed, in that all truth is contingent, grounded in some act of judgment. Don't read this the wrong way: contingent != relative. It just means that we need to address the question of "how do I know that true things are true?".

The cultural impact of the enlightenment, especially of Kant, was to collapse "truth" into an intersubjective agreement based on sensory observation ("science"), but how can you achieve intersubjective agreement in affairs which are only observable to a single subject, such as "my emotions" (i.e. "how is psychology possible?")? This is where psychoanalysis had its real epistemological innovation: free association as a technique is a way of generating shared knowledge about what was formerly private. Christian "confession" functioned similarly. Modern behavioral psychology is several steps behind. But with or without such a technique, one can never really achieve the absolute (gnostic) truth about oneself, at least not without a strong frame that answers the question "under what circumstances is a given statement about myself true?"

It seems better to ask the question of "what do I want that I'm having difficulty achieving? And what factual observations about myself can I make, which demonstrate patterns that prevent me from achieving this?" Notice how this moves the direction of thought (of reason, even!) away from "finding the truth" and toward a more environmentally-oriented mode of "understanding", closer to what Plato meant by that term, with its connections to "wisdom". The "hard truth" here as I mean it, is noticing sites of competing desires, as Spinoza and Freud do in their discussions of "ambivalence", and then being willing to take a stance or a risk that attempts to resolve the tensions.

With that in mind...

> I don't think psychotherapy needs particularly to be correct about the causes it posits in order to function as therapy. Whereas if you are mistaken about the evolutionary cause of an emotion, you will completely misconstrue it and probably behave badly.

This is a feature, not a bug, because as I said earlier, the goal isn't to discover some absolute truth about yourself, but to solve problems. Evopsych explanations claim to provide truth, but actually serve to solve problems, through some intellectual sleight-of-hand.

Similarly, the use of reason in thought serves to solve problems, meet individual needs, even if framed as "uncovering the truth". This + my deep involvement in the rationalist world for several years is why I feel comfortable making statements like this one from a few days ago: https://news.ycombinator.com/item?id=28198926