If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
Recently I have been thinking about imaginary expertise. It seems remarkably easy for human brains to conflate "I know more about this subject than most people" with "I know a lot about this subject". LessWrongers read widely over many areas, and as a result I think we are more vulnerable to doing this.
It's easy for a legitimate expert to spot imaginary expertise in action, but do principles exist to identify it, both in ourselves and others, if we ourselves aren't experts? Here are a few candidates for spotting imaginary expertise. I invite you to suggest your own.
Rules and Tips vs Principles
At some point, a complex idea from [topic] was distilled down into a simple piece of advice for neonates. One of those neonates took it as gospel, and told all their friends how this advice formed the fundamental basis of [topic]. Examples include "if someone touches their nose, they're lying" and "never end a sentence with a preposition".
If someone offers a rule like this, but can't articulate a principled basis for why it exists, I tend to assume they're an imaginary expert on the subject. If I can't offer a principled basis for any such rule I provide myself, I should probably go away and do some research.
Grandstanding over esoteric terminology
I've noticed that, when addressing a lay audience, experts in fields I'm familiar with rarely invoke esoteric terminology unless they have to. Imaginary experts, on the other hand, seem to throw around the most obscure terminology they know, often outside of a context where it makes sense.
I suspect being on the receiving end of this feels like Getting Eulered, and dishing it out feels like "I'm going to say something that makes you feel stupid".
Heterodoxy
I have observed that imaginary experts often buy into the crackpot narrative to some extent, whereby established experts in the field are all wrong, or misguided, or slaves to an intellectually-bankrupt paradigm. This conveniently insulates the imaginary expert from criticism over not having read important orthodox material on the subject: why should they waste their time reading such worthless material?
In others, this probably rings crackpot-bells. In oneself, this is presumably much more difficult to notice, and falls into the wider problem of figuring out which fields of inquiry have value. If we have strong views on an established field of study we've never directly engaged in, we should probably subject those views to scrutiny.
I agree with what you wrote. Having said this, let's go meta and see what happens when people will use the "rules and tips" you have provided here.
A crackpot may explain their theory without using any scientific terminology, even where a scientist would be forced to use some. I have seem many people "disprove" the theory of relativity without using a single equation.
If there is a frequent myth in your field that most of the half-educated people believe, trying to disprove this myth will sound very similar to a crackpot narrative. Or