We recently established a successful Useful Concepts Repository. It got me thinking about all the useless or actively harmful concepts I had carried around for in some cases most of my life before seeing them for what they were. Then it occurred to me that I probably still have some poisonous concepts lurking in my mind, and I thought creating this thread might be one way to discover what they are.
I'll start us off with one simple example: The Bohr model of the atom as it is taught in school is a dangerous thing to keep in your head for too long. I graduated from high school believing that it was basically a correct physical representation of atoms. (And I went to a *good* high school.) Some may say that the Bohr model serves a useful role as a lie-to-children to bridge understanding to the true physics, but if so, why do so many adults still think atoms look like concentric circular orbits of electrons around a nucleus?
There's one hallmark of truly bad concepts: they actively work against correct induction. Thinking in terms of the Bohr model actively prevents you from understanding molecular bonding and, really, everything about how an atom can serve as a functional piece of a real thing like a protein or a diamond.
Bad concepts don't have to be scientific. Religion is held to be a pretty harmful concept around here. There are certain political theories which might qualify, except I expect that one man's harmful political concept is another man's core value system, so as usual we should probably stay away from politics. But I welcome input as fuzzy as common folk advice you receive that turned out to be really costly.
The concept of "deserve" can be harmful. We like to think about whether we "deserve" what we get, or whether someone else deserves what he/she has. But in reality there is no such mechanism. I prefer to invert "deserve" into the future: deserve your luck by exploiting it.
Of course, "deserve" can be a useful social mechanism to increase desired actions. But only within that context.
It's part of a larger pattern of mistaking your interpretations of reality as reality itself. There's no ephemeral labels floating around that are objectively true - you can't talk too much, work too hard, or be pathetic. You can only say things that other people would prefer not to hear, do work to the exclusion of other objectives, or be pitied by someone.