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.
Within my lifetime, a magic genie will appear that grants all our wishes and solves all our problems.
For example, many Christians hold this belief under the names the Kingdom, the Rapture, and/or the second coming (details depend on sect). It leads to excessive discounting of the future, and consequent poor choices. In Collapse Jared Diamond writes about how apocalyptic Christians who control a mining company cause environmental problems in the United States.
Belief in a magic problem solving genie also causes people to fail to take effective action to improve their lives and help others, because they can just wait for the genie to do it for them.
Or that we will create a magic genie to grant all our wishes and solve our problems?