- EXISTENCE ITSELF. Face it. What do you understand about life, the universe and everything that isn't fundamentally this trope?
- Dreams. The ones that make sense are perhaps the least common.
- In fact, the original Surrealist movement used dreams as its main inspiration. Given our tendency to refer to weird things as "surreal" nowadays, one could argue that dreams are the origin of Mind Screw art.
- The theory of relativity. What’s your understanding of space and time? Location, distance, speed are all unambiguous, time is the same for everyone, etc? It's wrong. Space (and time too, possibly) just doesn't work that way. And that's just Special Relativity. Its big brother General Relativity is a lot more mind-screwing than that.
- Time even more so than space. Is it a real, tangible force that flows in four or more directions in four or more dimensions? Or is it just an existential explanation for gradual change which sates our need to catalog events and arrange everything into patterns? (Or alternately - from a non-linear, non-subjective viewpoint - is it more like a big ball of wibbly-wobbly, timey-wimey... stuff?) The debate has raged for hundreds of years. Not helping is the fact that sometimes physics doesn't need to take time into account. Neither is the fact that, according to some simulations, time might be slowing down. Or maybe not—how would we know?
- For that matter, anything related to time travel theories. To further the point, look at the Temporal Paradox and Timey-Wimey Ball tropes. Read those and tell me you are not confused.
- Black holes. Read Black Holes and you’ll (not) understand why.
- Richard Feynman once quipped, "If you think you understand quantum mechanics—you don't understand quantum mechanics." To give one example: small particles behave like waves. When a light wave goes through two slits right next to each other, it creates an interference pattern of light and dark bars. Doing the same with lots of electrons yields the same results, with light bars meaning more electrons hit there and dark bars meaning less. Doing the same with one electron at a time and adding the results together yields the exact same result. Translation: the electron goes through both slits and interferes with itself. Observing the electron as it goes through gives a pattern of just two bars, as if the electron behaves solely like a particle, meaning simply observing the experiment changes the results.
- Given what we said above, it seems that any theory that reconciles general relativity with quantum mechanics would necessarily be a Mind Screw itself.
- Abstract algebra, topology, and anything in mathematics that isn't immediately usable in some engineering/economics field (and those aren't completely exempt). Forget everything that you claim to know about such "trivial" things as addition, multiplication, division, space (space, as in 3D space), etc. Remember that some of the trippier aspects of quantum-mechanics are just special cases in mathematics.
- Mathematically, Quantum Theory is quite simple, really. It's in trying to make sense of it that things get ugly.
- One of the weirder things to come out of topology and set theory is a mathematical structure called the "long line". It's like the usual real line, but much longer. Yes, it's longer than a line of infinite length. (Making sense of what that means requires some set theory.) So much longer, in fact, that even an infinite sequence of steps can only cover a tiny portion of it.
- Almost any mathematical concept taken to a high-enough level qualifies, right up to the concept of numbers. Much of this has to do with the weirdness inherent in set theory (everything is a set; an element in a set, which is a type of subset; a subset of a set, which can itself be considered a set; or a relation on a set) and infinities (yes, plural—there are different sizes. See below).
- For spatial mathematics, consider this: The 'right-hand' 3-dimensional Vector direction of Y is counter-clockwise from X, which is clockwise from Z, which is counter-clockwise from Y. What this means is that Left is -1, Right is + 1, Down is -1, Up is + 1... and Backward is + 1, Forward is -1. Somehow, this makes the math work right.
- Anything about 4-dimensional objects (or worse, more). If you take a bunch of 2D squares and fold them up, you get a cube. If you take a bunch of 3D cubes and fold those up, you get a tesseract◊.^{note }
- Fractals. Taken from the right perspective, it's impossible to tell a tiny sliver of melting ice from a glacier hundreds of square miles in size. Many natural features exhibit self-similarity across mind-boggling scales.
- e^{iπ}—an irrational, transcendental number raised to the power of the product of another transcendental number and an imaginary number—equals what now?
- -1.
- Leading to Euler's identity (aka Euler's equation), widely considered to be an example of deep mathematical beauty: e^{iπ} + 1 = 0.
- Speaking of e, it has so many nice properties in so many seemingly unrelated areas that it seems to be an key component OF MATH ITSELF. Think about it.
- Same with π.
- Imaginary numbers. A product of sheer impossibility created by the simple action of taking the square root of a negative number.
- Electrical engineers use them to model the behavior of Alternating Current (AC) circuits because they actually do correctly describe how these circuits behave!
- Not only applicable in electrical engineering, but fluid dynamics and aerodynamics too. Well defined two-dimensional fluid flows can be complete solved using a series of transformations involving imaginary numbers.
- Negative temperature. No, not negative Celsius or Fahrenheit, that would make too much sense. It is a truly negative temperature in Kelvin. It is the temperature of something so "cold" it is hotter than anything with a positive temperature so when they come into contact heat will flow from the system with negative temperature to the one with positive temperature. In other words, temperature seen as a dial that has been turned past the 0-point and ended up at the other "end point".
- Biggest Mind Screw in Mathematics or a faulty proof?
- i.e., for "x^{n} + y^{n} = z^{n} you can only find integer values for x, y and z that will produce a valid equation where n <= 2.
- Considering that it was never mentioned by Fermat again and that the eventual solution was 150 pages of extremely complex math involving mathematical concepts that didn't exist during Fermat's time (i.e. before basic calculus), it's almost certain that Fermat discovered his proof was wrong and never mentioned that fact, or had no proof at all, but we may never know. Some have suggested that his theorem was a practical joke to frustrate fellow mathematicians: It's true, they just couldn't prove it. It is now the mathematical equivalent of the The Great Politics Mess-Up: Some Sci-Fi shows say that Fermat's Theorem has still never been solved (Star Trek: The Next Generation, for example, made a reference to it saying that it wasn't solved), when it fact it finally has.
- The Banach-Tarski theorem states that any ball can be divided into pieces and reassembled into two balls the same size as the original. Irregular Webcomic! offers an explanation in (almost) layman's terms as to how this is possible. It isn't. It only works with mathematical abstractions, not actual objects.
- Gödel's Incompleteness Theorems. The first one shows that any consistent axiomatic system sophisticated enough to encompass elementary arithmetic contains statements that are true but cannot be proved in the system. Even more mind-screwtastic is Tarski's Indefinability Theorem, which states that the set of true statements in an axiomatic system is a non-namable set. Just think about it: it states that truth is indefinable in an axiomatic system.
- If you thought The Matrix was mind-boggling, and you Did The Research, you already should be familiarized with Monsieur Jean Baudrillard. If don't, and you don't want to know that we live in a increasingly complex fake reality over-imposed onto reality by the media apparatus and the exchange system which we gladly buy in a daily basis, you better keep it that way. A brief reflexion on his school of thought:
- Simulacrum is not what covers the truth.
- Is truth the one which covers the fact that there is no truth.
- Simulacrum is true.
- You may find it amusing at first, the scary part comes when you start nodding and saying "Uh oh, it's starting to make sense".
- The Zen Koan is to make you achieve enlightenment by Mind Screws.
- What did your face look like before your parents were born?
- Two hands clap and there is a sound. What is the sound of one hand?
- Don't know, ask Rory Swann.
- Bart Simpson figured that one out—he just slapped his fingers against his palm.
- It's "cl". The other hand makes the "ap".
- This apparently.
- "What is Buddha?" Dongshan said, "Three pounds of flax."
- Mu
- Complexity Theory (aka Ramsey Theory), which is at least as old as Chaos Theory and is the counterpart to it; it states that, given enough data, it is impossible for there not to be some kind of pattern to them. (Which doesn't signify that said pattern means anything...)
- Boltzmann brain. A Brain in a Jar-like, self-aware entity that, given enough time, would appear from nothing, complete with false memories and totally oblivious to the fact it's in the middle of the most absolute nowhere.
- And there's some evidence that this is more likely than the world as we know it being real.
- The concept of solipsism: Everything and everyone around you exists only so long as you do, potentially for as long as you do. You are the lynch-pin of the universe.
- Ever think about parallel universes? Most would have completely different sets of physical laws, assuming "laws" are a viable concept; or even if "concepts" have the capability to exist. Or if existence in itself is warped beyond human comprehension. And the worst thing of all, is that all these crazy, otherworldly, incomprehensible laws all makes sense within that universe, it all conforms to that universe's rules or "laws". Just thinking about it makes your head hurt.
- It's even worse. See the "infinite" entry below.
- Infinity and eternity will make your head hurt. Especially the fact that some infinities are larger than others.
- If you consider possibilities such as our universe being infinite and/or an infinite number of other universes existing, is even more brain-hurting, as everything would happen an infinite number of times. Solutions to the paradoxes brought by them range from assuming time will end someday to our inability to compute infinite probabilities.
- LSD's effects. Completely subjective to the individual and utterly incomprehensible to someone who has never taken it.
- True Art.
- Post-Modernism loves this.
- Many Chuck Norris Facts and Soviet Russia jokes count as this. Just how does a car drive a human?
- The May Day Mystery, an uncategorizable and indescribable series of bizarre documents, possibly the coded annals of a conspiracy. Sure, it could all just be an (insanely) elaborate hoax, but What Do You Mean, It's Not Symbolic?? If you squint and turn your head it kind of looks like an Alternate Reality Game.
- This collection of stock photos. While most are simply funny or inappropriate, some make absolutely no sense, like the one showing a man with a pineapple for a head.
- The now-infamous dress. Depending on how your brain processes color, it may appear to be either white and gold or blue and black—and good luck convincing someone who sees it the other way. (The real colors, apparently, are blue and black.)
- And now more and more people who Take a Third Option have appeared, claiming that the dress is blue and dark gold.
- The "Yanny vs. Laurel" auditory illusion is a similar (and similarly memetic) phenomenon, though for the ears this time rather than the eyes.
- Research on dual consciousness. It is not even known whether it really exists, and how to define it.
- TV Tropes:
- At least half the entries in Wild Mass Guessing.
- The Third-Person Person page. How many of the Real Life entries are posted by the person they speak of?
- Homestuck's ~ATH coding language is a parody of programming in general, and esoteric languages in the specific.
- Any esoteric programming language will qualify as a Mind Screw. For bonus points, there's one named "brainfuck."
- There's a joke that goes, "On a foggy morning, two people encountered each other on opposite ends of a long bridge. On one end, Alice stood, peering over the bridge and wondering if the person across was Bob or not. On the other side, Bob stood, believing the person across the bridge to be Alice but not being sure of it. Then the two people crossed simultaneously, met in the middle, and discovered to their surprise that it was neither of them."
- Paradoxes are a great way to way to screw with your mind and make you question everything. Spend some time reading the List of paradoxes on The Other Wiki. Here are some examples.
- Raven paradox: (or Hempel's Ravens): Observing a green apple increases the likelihood of all ravens being black.
- Ant on a rubber rope: An ant crawling on a rubber rope can reach the end even when the rope stretches much faster than the ant can crawl.
- Potato paradox: If you let potatoes consisting of 99% water dry so that they are 98% water, they lose 50% of their weight.
- Hilbert's paradox of the Grand Hotel: If a hotel with infinitely many rooms is full, it can still take in more guests.
- Moore's paradox: "It's raining, but I don't believe that it is."