a severe mental disorder in which thought and emotions are so impaired that contact is lost with external reality.
There is a fine line between sanity & insanity: A large portion of the public is in denial about evolution, global warming, vaccination, etc. Most of this can be attributed to distorted views of reality, as defined by personality type. But only a few are driven to egregiously contradict well-established science when doing so cannot have any direct effect on their everyday life.
This page is dedicated to the many people who have occasionally drifted into my office, or sent me e-mail, or even mailed me their books, eager to tell me about their new theory, which they know will turn all known physics on its head, even though they have only studied an infinitesimal fraction of the latter. Some of them are just ignorant or naive, but are willing to learn; this page is not about them.
There is a distinction between "artistic" scientists & true quacks. The former have some bold new hypotheses (i.e., educated guesses) that have not completely confronted reality. (A former advisor of mine had a bumper-sticker-like sign in his office that went something like, "Your new theory is beautiful and elegant. Too bad it's wrong.") The latter have old ideas that have been fudged to try to reproduce some of the results of new ideas. (For example, anyone sticking to Ptolemaic epicycles after the advent of Copernicus & Kepler would fall into this category. Fairy tales are also old ideas.) Real quacks would not even make good science fiction authors.
On the other hand, there are also "pessimistic" scientists. They do not reject proven science, but refuse to consider new conjectures until they have been proven beyond a shadow of a doubt. Unfortunately, playing it safe seldom leads to new discoveries. ("Nothing ventured, nothing gained.") These also differ from quacks, who tend to reject proven science of much (if not all) of the 20th century.
Quacks (also known as "crackpots" or "cranks") have several well-known mental conditions in common with other conspiracy theorists:
grandiosity
Quacks are dogmatists: Their point of view is a belief. A belief is something one assumes to be true because one wants it to be true. They only come up with "proofs" or "evidence" to sway non-believers to their belief. So you can waste your time disproving all their fallacies, but it won't matter to them, because they were invented only for you, & are totally irrelevant to their conviction.
truthiness
Note: You will not dispell a quack's distaste for modern physics by relating it to classical physics, since they usually do not understand that either. This is an unusual example of "Familiarity breeds contempt."
Quacks seem to dislike modern physics literally because of the word "relativity": In their attacks, they focus on what is relative, not on what is absolute. They know special relativity says time is relative, but don't understand (or care) that proper time is absolute. In rejecting relativity, they replace it with the ether, rejecting even Galilean relativity, because they refuse to accept that even velocity can be relative. They know general relativity says reference frames are arbitrary, but don't know that it's curvature that displays the physics. They've heard that the uncertainty principle says there are things you can't measure, but don't know what you can measure. Apparently they view modern physics as an attempt to limit their personal freedom. Their egotism does not allow them to accept any frame of reference as equal to their own.
Consequently they are basically 19th century physicists, except for the fact that they don't understand even that. They focus on attacking the physics of the 1st quarter of the 20th century & its results, oblivious to the fact that it is backed up by all the dependent theories & results since then. They want to return to the "good old days", & constantly refer to archaic papers, as if history had anything to say about recent experimental results.
Thus quacks are in perfect agreement with the alleged statement of the Commissioner of the US Patent Office in 1899, "Everything that can be invented has been invented." So it's not surprising they reject ideas developed by someone while working @ the Swiss Patent Office a good several years later.
For those of you quacks who want to know what it's like trying to explain 20th century physics to someone like you, I suggest you go to this web site and try to explain 19th century physics to the people there.
contradiction
Update: I have already been yelled @ with a much bigger font --- another prediction confirmed.
Quacks are always "theorists". It never occurs to them that there are a large number of experiments with which their new theory must agree. (People who do cold fusion or sell snake oil are a level above these sorts.) This is because they live in worlds of fantasy, to which the real world can never be relevant. One quack emailed me that he had in fact done an experiment that disproved special relativity. Turned out that it was a "gedanken" experiment.
Another one told me that all the experimenters had purposely misinterpreted their raw data to make it agree with accepted theory. This was in spite of the facts that:
Apparently this quack was under the impression that all experimenters and theorists were part of a huge conspiracy, dating back decades (if not centuries), to unanimously support one theory. (If only cooperation between scientists were that good...) This is another example of how quacks are ignorant not only of physics, but also of psychology.
Note: Quacks come in slightly different levels of sophistication in math. Some use only words, and no numbers whatsoever, but lots of pictures. (However, with today's technology, it's easy for some of them to copy & paste equations they think look nice.) The worst one I ever corresponded with claimed that dimensions did not physically exist, but were just abstract mathematical concepts, and you could never prove the existence of anything unless you could do it without equations. After giving him the examples of directions, he claimed that "up" and "down" did not physically exist.
Better ones actually know arithmetic, but no algebra, so even E=mc2 is usually beyond them. They will quote lots of numbers, which they "predicted" by some numerology, but never functions (like cross sections). They don't understand units, or conventions, and will not appreciate that some constants of nature may be more natural with extra factors of 2π or so, or that some are actually not constants (like running couplings).
None of them seem to understand statistics. So they are incapable of estimating the relative probabilities of the existence of worldwide conspiracies vs. that of the existence of quacks.
Since quacks never get over special relativity & quantum mechanics, even the ones who "re-derive" those results never get to doing the same for general relativity or quantum field theory. They take great pride in what they take as reproducing the physics of Maxwell's equations or maybe even the Schrödinger equation, but have no awareness of the equations of Dirac or Einstein (gravity). They have no understanding of the meaning of "approximation" or "perturbation expansion". The worst don't even know how to make order of magnitude estimates, to determine what is & isn't relevant to a problem. One actually told me that in the problem of an artificial satellite orbiting the Earth, the motion of the Earth about the true center of their mutual orbit was not negligible, in spite of the fact that the satellite's mass was over 20 orders of magnitude smaller than the Earth's.
Note: Quacks usually contradict Galileo, by rejecting Galilean relativity. They also often personally attack Einstein, claiming his useful stuff was done by Lorentz, who found fewer results based on more assumptions (like ether). I even got one claim that Voigt did Lorentz transformations 1st, ignoring the fact that he got them wrong. Apparently, being 1st is more important than being right. That allows them to stay in the 19th century, & pretend special relativity is wrong because Einstein didn't discover anything.
Note: Quacks, like criminals, often blame others for their own crimes. They call real science "belief". If you try to explain to a quack the actual physics at even high school level, he will immediately claim that you are the one who is ignorant.
The amazing thing is that many quacks claim to have read this very page, & yet repeat the exact mistakes listed here. They have a predictable, uncontrollable compulsion to make these same errors. When realizing they have done so, their guilt then forces them to accuse me of those very faults.
(of an argument or reaction) directed against a person rather than the position they are maintaining.I'm not attacking you instead of your position, I'm attacking you because of your position. When a scientist is contacted by a stranger with a proposal in obvious contradiction of the facts, it isn't difficult to determine whether they are lying or just ignorant. Normal people (including scientists) are willing to accept criticism & correct their errors, @ least in matters not involving politics or religion. Quacks never admit their errors, much less apologize for them or correct them. E.g., take Donald Trump (please). Now imagine him contradicting special relativity or quantum mechanics, something which would not profit him in any way. That gives you an idea of how a quack sounds to a scientist. Consider what a waste of time it would be to have a prolonged discussion with such a person. That's why scientists bother identifying the personality disorders of such individuals. If someone fires a gun @ you, you don't criticize only the bullets.
Note: Long ago a professor of mine told me that he got letters from 2 quacks, so he forwarded each's letter to the other. He got back an angry letter from one saying, "Why did you introduce me to this quack?"
Note: Some quacks have blogs, to try to attract moral support from other quacks. I found one such site devoted exclusively to attempted character assassination of physicists. I was criticized for my physical attributes, including some bigotry I haven't heard since elementary school. Quacks are totally oblivious to the fact that childish behavior serves only to destroy any shred of credibility they might have had left, & they will not hesitate to disseminate this as widely as possible. (Apparently their parents never taught them internet manners.)
Mental illness is common, but most of the afflicted can still function in today's society (although often this is because they are retired).
Most people continue to use computers, even if some deny the science they are based upon.
(Quacks are hypocrites as well as ingrates.)
The situation is less serious in physics than biology:
Some people pass laws to prohibit or restrict the teaching of evolution,
but there have been no serious attempts to outlaw special relativity or quantum mechanics since the days of Hitler & Stalin (which failed because nuclear science required them).
Fortunately, the world depends on the technology derived from modern physics for its economy, communication, leisure, etc.