bunchberry
@bunchberry@lemmy.world
- Comment on Memories of a bygone era 2 weeks ago:
i use one of those trackball mice with the ball on top. first time i tried it i never went back, no need to worry about having a proper surface or desk space for a mouse ever again. if you reach the side of your desk using an optical mouse, you have to pick the mouse up and move it all the way to the other side of the desk, while is a proper ball mouse (a good one without too much resistance) when you flick the ball it can continue spinning a bit even as you release it, so you can flick it to the side and then bend your wrist slightly to then flick it again, and the mouse cursor will just continue moving without stopping, which in games you can do this to have endless turning around, when turning is always stuttery on an optical mouse due to hitting the end of the desk. it takes a little bit to get used to, but at least a good one with limited resistance and a large ball, you can easily get just as accurate as an optical mouse as well. the only downside i find is that i do have to take the trackball out and clean it like the ones on the bottom.
- Comment on Does anyone else think the NYPD photos of the UHC CEO shooting suspect don’t match? 2 weeks ago:
Yeah, the jacket is very different as well if you look at the front chest area. While people do say maybe he just changed his clothes, the problem is if he also changed his backpack, he couldn’t have just put the clothes in the backpack, meaning he would’ve had to have left them somewhere and there would’ve been a trail that probably would’ve been found by now. It doesn’t really add up for them to be the same person.
- Comment on Tipping culture is out of control, even the cops expect tips now! 3 weeks ago:
How do we even know that’s the killer? The person who shot was wearing a mask. For all we know it wasn’t even a man, some women are flat chested it’s possible. They should probably just call off the investigation since there’s no clues for anything.
- Comment on 1+1= 3 weeks ago:
In boolean algebra 1+1=0.
- Comment on SHINY 3 weeks ago:
It’s always funny seeing arguments like this as someone with a computer science education. A lot of people act like you can’t have anything complex unless some intelligent being deterministically writes a lot of if-else statements to implement it, which requires them to know and understand in detail what they are implementing at every step.
But what people don’t realize is that this is not how it works at all, there are many problems that are just impractical to actually “know” how to solve yet we solve them all the time, such as voice recognition. Nobody in human history has ever written a bunch of if-else statements to be able to accurately translate someone’s voice to text, because it’s too complicated of a problem, no one on earth knows how it works.
Yet, of course, your phone can do voice recognition just fine. That is because you can put together a generic class of algorithms which find solutions to problems on their own, without you even understanding the problem. These algorithms are known as metaheuristics. Metaheuristics fundamentally cannot be deterministic, they require random noise to work properly, because something that is deterministic will always greedily go in the direction of a more correct solution, and will never explore more incorrect solutions, whereby an even better solution may be beyond the horizon of many incorrect ones. Technically speaking, we would say they get stuck in a local minimum.
A simple example of a metaheuristic is that of annealing. If you want to strengthen a sword, you can heat up the metal really hot and let it slowly cool. While it’s really hot, the atoms in the sword will randomly explore different configurations, and as it cools, they will explore less and less, and the overall process leads them to finding rather optimal configurations that strengthen the crystaline structure of the metal.
This simple process can actually be applied generally to solve pretty much any problem. For example, if you are trying to figure out the optimal route to deliver packages, you can simulate this annealing process but rather than atoms searching for an optimal crystaline structure, you have different orders of stops on a graph searching for the shortest path. The “temperature” would be a variable that represents how much random exploration you are willing to accept, i.e. if you alter the configuration and it’s worse, how much worse does it have to be for you to not accept it. A higher temperature would accept worse solutions, at very low temperatures you would only accept solutions that improve upon the route.
I once implemented this algorithm to solve sudoku puzzles and it was very quick at doing so.
There are tons of metaheuristic algorithms, and much of them we learn from nature, like annealing, however, there’s also genetic algorithms. The random exploration is done through random mutations through each generation, but the deterministic and greedy aspect of it is the fact that only the most optimal generations are chosen to produce the next generation. This is also a generic algorithm that can be applied to solve any problem. You can see a person here who uses a genetic algorithm to teach a computer how to fly a plane during a simulation.
Modern AI is based on neural networks, which the greedy aspect of them is something called backpropagation, although this on its own is not a metaheuristic, but modern AI tech arguably qualifies because it does not actually work until you introduce random exploration like a method known as drop out whereby you randomly remove neurons during training to encourage the neural network to not overfit. Backpropagation+dropout forms a kind of metaheuristic with both a greedy and exploratory aspect to it, and can be used to solve any generic problem.
Indeed, that’s how we get phones to recognize speech and convert it to text. Nobody sat down and wrote a bunch of if-else statements to translate text into speech. Rather, we took a generic nature-inspired algorithm that can produce solutions for any problem, and just applied it to speech recognition, and kept increasing the amount of compute until it could solve the problem on its own. Once it solves it, the solution it spits out is kind of a black box. You can put in speech as an input, and it gives you text as an output, but nobody really even knows fully what is going on in between.
People often act like somehow computers could not solve problems unless humans could also solve them, but computers already have solved millions of problems which not only has no human ever solved but no human can even possibly understand the solution the computer spits out. All we know from studying nature is that there are clever ways to combine random exploration and deterministic greed to form processes which can solve any arbitrary problem given enough time and resources, so we just implement those processes into computers and then keep throwing more time and resources at it until it spits out an answer.
We already understand how nature can produce things without anyone “knowing” how it works, because we do that all the time already!
- Comment on No need to boil the ocean 3 weeks ago:
No, the point is that bacteria can produce toxins in between a company packaging a product and a person receiving it and then boiling it themselves. Companies have to kill the bacteria prior to shipping it. It’s similar to canned foods for example, they put it in the can then heat up the can to kill the bacteria, then ship it, so it shouldn’t have any harmful bacteria in there to begin with.
- Comment on No need to boil the ocean 3 weeks ago:
Boiling things isn’t guaranteed to make it safe, because sometimes bacteria produce toxins as a byproduct that are heat-stable, so if you kill the bacterial you can still get food poisoning if you drink it.
- Comment on Meal prep 3 weeks ago:
I am an American and i own an electric kettle and use it frequently. I switched to an electric kettle after accidentally turning my microwave into a smoke bomb when I put instant ramen in there and forgot to add the water. Now I only make instant ramen with hot water from a kettle or on the stove.
- Comment on human anteaters 3 weeks ago:
I can’t say I’ve ever gotten ant on my finger then proceeded to smell my finger.
- Comment on Scalper economy 4 weeks ago:
You can indeed make money by selling it at a higher price without ever using or modifying it, and even if you do use or modify it, profits from the sale still come directly from not using or modifying it.
- Comment on Scalper economy 4 weeks ago:
In Cuba they have a law that requires you to sell your house if you buy a new one. That also means you can’t be a landlord or else you yourself would be homeless. They also have a law that guarantees that if you don’t own your own home, you at least get public housing guaranteed, which has rent capped at 10% of income so it can never exceed that. They have the lowest homelessness rate in all of the Americas.
- Comment on Scalper economy 4 weeks ago:
fumo is a basic human need
- Comment on Scalper economy 4 weeks ago:
Not sure I see the relevance. Yes, housing maintenance costs money, what’s the relevance? Who says housing upkeep is free? What’s the relevance to anything at all?
- Comment on Scalper economy 4 weeks ago:
It always impresses me how much people worship landlords, even Canada up there is having a housing crisis but nobody dares question the sanctity of landlords. You can watch both the major parties arguing for hours and nobody ever brings up landlordism once. A lot of them choose to instead become hostile to immigrants instead, both parties moving further right on immigration because stopping immigration or potentially even kicking out immigrants to them is more acceptable than questioning the sanctity of landlords. You also saw a similar thing here in the USA, I remember after the Trump/Kamala debate when they revealed the plans for bringing housing prices down and Trump was “mass deportation” and Kamala was “a tax credit.” Not sure about every country definitely here in US and Canada, people here treat landlords like unquestionable deities, the idea that their right to rule should even be called into question is not even something that passes through most people’s heads.
- Comment on Thought-provoking 4 weeks ago:
Not surprising as much of online conservatism these days is just gooning. They’re all porn addicts who cry about the wokes taking away their softcore porn from their video games.
- Comment on 8 yr old me after my parents did my woodworking assignment 4 weeks ago:
the closest thing i guess would be his hyperloop white paper lol
- Comment on Quantum physics 4 weeks ago:
Well, what is boring and non-boring I guess is in the eye of the beholder. What I moreso was referring to is what is difficult to wrap your head around.
The nondeterminism is kind of unavoidable as long as you don’t want to change the mathematics of the theory itself, but I also don’t really consider nondeterminism to be that unintuitive or difficult to “understand.” I mean, throughout most of human history, it wasn’t that common for humans to actually believe in determinism in the Laplacian sense of being able to make absolute prediction to the future based on complete knowledge of the past, that was largely popularized with the rise of Newtonian mechanics, and even by the 19th century you had even a lot of materialist philosophers calling it into question on grounds of logical consistency. Personally, I think the strong desire to maintain Laplacian determinism is really a physicist thing. They work with Newtonian mechanics first and it becomes so intuitive some don’t want to let it go when it comes to quantum mechanics. But I doubt if you went and talked to the average person, most probably wouldn’t be that strongly adherent to Laplacian determinism.
The kinds of views I was talking about are more things like people who try to interpret the state vector as literally representing a physical wave spreading out in space that collapses like a house of cards when you perturb it, or try to envision a literal multiverse where everything is just a big “universal wave function.” A lot of these bizarre views are not only unintuitive but they run into a lot of problems in logical consistency and there have been mountains papers and books published on the subject trying to work out all the conceptual issues. If you are a person just learning QM the philosophical interpretation around it bothers you, if you listen to people who talk about these weird things, you will need to read through dozens of books and maybe even hundreds of papers just to get a general idea of what is going on, and even then most of these interpretations still have no resolved their mountain of conceptual issues.
To me this really bothered me when I got into quantum computing for the first time. I wanted to not just learn the math but have some sort of intuition of what is actually going on. I then went down a rabbit hole of reading tons and tons and tons of books and academic papers to try and find some way to make the math make sense on a philosophical level. What I ultimately came to realize is that most of this confusion is just self-imposed in the sense that they are based on assumptions which are not actually demanded by the mathematics and entirely optional (such as interpreting a list of probability amplitudes a literal entity in a physical space) and thus most can be stripped away.
You can’t strip away every aspect of QM that makes it unique, because it clearly does differ from classical mechanics, but by dong this you do really hone down on what actually makes QM unique and what is genuinely an unavoidable consequence of the mathematics. And what you get down to is just interference effects, which arise from the fact that probability amplitudes are complex-valued, thus can cancel each other out, which can’t occur in classical probability theory. Nondeterminism and context-dependence then follow from this as a necessity for the theory to be logically consistent, but both of those are fairly easy to have an intuition for.
- Comment on Quantum 5 weeks ago:
no that’s dialectics
- Comment on Quantum physics 5 weeks ago:
I am saying that assigning ontological reality to something that is by definition beyond observation (not what we observe and not even possible to observe) is metaphysical. If we explain the experiment using what we observe then there is no confusing or contradiction, or any ambiguity at all. Indeed, quantum mechanics becomes rather mechanical and boring, all the supposed mysticism disappears.
It is quite the opposite that the statistical behavior of the electron is decoupled from the individual electron. The individual electron just behaves randomly. There is no interference pattern at all for a single electron, at least not in the double-slit experiment (the Mach–Zehnder interferometer is arguably a bit more interesting). The interference pattern observed in the double-slit experiment is a weakly emergent behavior of an ensemble of electrons. You need thousands of them to actually see it.
- Comment on Quantum physics 3 months ago:
What is it then? If you say it’s a wave, well, that wave is in Hilbert space which is infinitely dimensional, not in spacetime which is four dimensional, so what does it mean to say the wave is “going through” the slit if it doesn’t exist in spacetime? Personally, I think all the confusion around QM stems from trying to objectify a probability distribution, which is what people do when they claim it turns into a literal wave.
To be honest, I think it’s cheating. People are used to physics being continuous, but in quantum mechanics it is discrete. Schrodinger showed that if you take any operator and compute a derivative, you can “fill in the gaps” in between interactions, but this is just purely metaphysical. You never see these “in between” gaps. It’s just a nice little mathematical trick and nothing more. Even Schrodinger later abandoned this idea and admitted that trying to fill in the gaps between interactions just leads to confusion in his book Nature and the Greeks’ and Science and Humanism.
What’s even more problematic about this viewpoint is that Schrodinger’s wave equation is a result of a very particular mathematical formalism. It is not actually needed to make correct predictions. Heisenberg had developed what is known as matrix mechanics whereby you evolve the observables themselves rather than the state vector. You can also do a similar trick and derive continuous evolution of the observables in between interactions in matrix mechanics, but what you get is, again, observables continuously changing, not the evolution of a wave function.
The wave function is purely a result of a particular mathematical formalism and there is no reason to assign it ontological reality. Even then, if you have ever worked with quantum mechanics, it is quite apparent that the wave function is just a function for picking probability amplitudes from a state vector, and the state vector is merely a list of, well, probability amplitudes. Quantum mechanics is probabilistic so we assign things a list of probabilities. Treating a list of probabilities as if it has ontological existence doesn’t even make any sense.
- Comment on Is Everyone Conscious in the Same Way? | Simon Roper 3 months ago:
i’d agree that we don’t really understand consciousness. i’d argue it’s more an issue of defining consciousness and what that encompasses than knowing its biological background.
Personally, no offense, but I think this a contradiction in terms. If we cannot define “consciousness” then you cannot say we don’t understand it. Don’t understand what? If you have not defined it, then saying we don’t understand it is like saying we don’t understand akokasdo. There is nothing to understand about akokasdo because it doesn’t mean anything.
- Comment on Is Everyone Conscious in the Same Way? | Simon Roper 3 months ago:
Bruh. We literally don’t even know what consciousness is.
You are starting from the premise that there is this thing out there called “consciousness” that needs some sort of unique “explanation.” You have to justify that premise. I do agree there is difficulty in figuring out the precise algorithms and physical mechanics that the brain uses to learn so efficiently, but somehow I don’t think this is what you mean by that.
We don’t know how anesthesia works either, so he looked into that and the best he got was it interrupts a quantom wave collapse in our brains
There is no such thing as “wave function collapse.” The state vector is just a list of probability amplitudes and you reduce those list of probability amplitudes to a definite outcome because you observed what that outcome is. If I flip a coin and it has a 50% chance of being heads and a 50% chance of being tails, and it lands on tails, I reduce the probability distribution to 100% probability for tails. There is no “collapse” going on here. Objectifying the state vector is a popular trend when talking about quantum mechanics but has never made any sense at all.
So maybe Roger Penrose just wasted his retirement on this passion project?
Depends on whether or not he is enjoying himself. If he’s having fun, then it isn’t a waste.
- Comment on Is Everyone Conscious in the Same Way? | Simon Roper 3 months ago:
The only observer of the mind would be an outside observer looking at you. You yourself are not an observer of your own mind nor could you ever be. I think it was Feuerbach who originally made the analogy that if your eyeballs evolved to look inwardly at themselves, then they could not look outwardly at the outside world. We cannot observe our own brains as they only exist to build models of reality, if our brains had a model of itself it would have no room left over to model the outside world.
We can only assign an object to be what is “sensing” our thoughts through reflection. Reflection is ultimately still building models of the outside world but the outside world contains a piece of ourselves in a reflection, and this allows us to have some limited sense of what we are. If we lived in a universe where we somehow could never leave an impression upon the world, if we could not see our own hands or see our own faces in the reflection upon a still lake, we would never assign an entity to ourselves at all.
We assign an entity onto ourselves for the specific purpose of distinguishing ourselves as an object from other objects, but this is not an a priori notion (“I think therefore I am” is lazy sophistry). It is an a posteriori notion derived through reflection upon what we observe. We never actually observe ourselves as such a thing is impossible. At best we can over reflections of ourselves and derive some limited model of what “we” are, but there will always be a gap between what we really are and the reflection of what we are.
Precisely what is “sensing your thoughts” is yourself derived through reflection which inherently derives from observation of the natural world. Without reflection, it is meaningless to even ask the question as to what is “behind” it. If we could not reflect, we would have no reason to assign anything there at all. If we do include reflection, then the answer to what is there is trivially obvious: what you see in a mirror.
- Comment on Crystals 4 months ago:
Orch0R makes way too many wild claims for there to easily be any evidence for it. Even if we discover quantum effects (in the sense of scalable interference effects which have absolutely not been demonstrated) in the brain that would just demonstrate there are quantum effects in the brain, Orch0R is filled with a lot of assumptions which go far beyond this and would not be anywhere near justified. One of them being its reliance on gravity-induced collapse, which is nonrelativistic, meaning it cannot reproduce the predictions of quantum field theory, our best theory of the natural world.
- Comment on double slit 4 months ago:
Both these figures are embarrassingly bad.
Hoffman confuses function for perception and constantly uses arguments demonstrating things can interpret reality incorrectly (which is purely a question of function) in order to argue they cannot perceive reality “as it is.,” which is a huge non-sequitur. He keeps going around promoting his “theorem” which supposedly “proves” this yet if you read his book where he explains his theorem it is again clearly about function as his theorem only shows that limitations in cognitive and sensory capabilities can lead something to interpret reality incorrectly yet he draws a wild conclusion which he never justifies that this means they do not perceive reality “as it is” at all.
Kastrup is also just incredibly boring because he never reads books so he is convinced the only two philosophical schools in the universe are his personal idealism and metaphysical realism, which the latter he constantly incorrectly calls “materialism” when not all materialist schools of thought are even metaphysically realist. Unless you are yourself a metaphysical realist, nothing Kastrup has ever written is interesting at all, because he just pretends you don’t exist. Metaphysical realism is just a popular worldview in the west that most Laymen tend to naturally take on unwittingly.
If you’re a person who has ever read books in your life, then you’d quickly notice that attacking metaphysical realism doesn’t get you to idealism, at best it gets you to metaphysical realism being not a coherent worldview… which that is the only thing I agree with Kastrup with.
- Comment on I don’t understand quantum physics 5 months ago:
Yes, there are a lot of intuitive understandings if the literature if you’re willing to look for it. The problem is that most people believe in a Newtonian and by extension Kantian view of the world which just is not compatible with quantum physics, so it requires you to alter some philosophical beliefs, and physics professors don’t really want to get into philosophical arguments, so it’s not really possible to reach a consensus on the question in physics departments. Even worse, there’s rarely a consensus on anything if you go to the philosophy department. So it’s not really that there are not very simple and intuitive ways to understand quantum mechanics, it’s that it’s not possible to get people to agree upon a way to interpret it, so there is a mentality to just avoid interpretation at all so that students don’t get distracted from actually understanding the math.
- Comment on Electrons are easy 5 months ago:
I think you are just trying to fight rather than actually have a discussion so I’m not really interested in going on, but I will say one last thing to clarify what I am saying for other people who might be reading.
If you say observation = interaction then this inherently leads you to RQM which is like the definition of the interpretation. As I said at the beginning, I do support this interpretation, I think it’s the most reasonable approach, but it should be made clear this is a rather fringe point of view and not supported by most academics. You can see in the paper below only 6% of academics support it. And you clearly don’t seem to support it yourself as you seem to be pushing back against that rather than just agreeing with my statement it is the most intuitive way to think about things.
The plurality there support the Copenhagen view where observation really is given a special role.
Without going the route of RQM then you end up with something that is just objectively false as the wave function would be incapable of spreading out since particles are always interacting with things, rendering quantum phenomena impossible.
You can clarify instead by saying observation → interaction, that is to say, an observation implies an interaction, i.e. it inherently always entails an interaction but not interactions are observations, however, if you do this, you end up with the measurement problem. That is to say, you need to actually construct a theory to account for what kinds of interactions actually qualify as a measurement/observation. To quote John Bell…
What exactly qualifies some physical systems to play the role of ‘measurer’? Was the wavefunction of the world waiting to jump for thousands of millions of years until a single-celled living creature appeared? Or did it have to wait a little longer, for some better qualified system . . . with a PhD?
Specifying a theory of measurement is known as an “objective collapse” model and they make different predictions than traditional quantum mechanics because depending on where you set the threshold for what kind of interaction qualifies as an “observation” changes how much the wave function can spread out before being collapsed again by such an “observation.”
There are several models of this like the Ghirardi–Rimini–Weber theory and the Diósi–Penrose model but these are ultimately more than just other interpretations of quantum mechanics but ultimately entirely new theories.
It is not so simple just to say “observation is an interaction” and then pretend like the job is done, or else there would be no confusion in interpreting quantum mechanics at all. There is a lot more clarification that has to be made in order for it to make sense.
- Comment on Electrons are easy 5 months ago:
Why do you keep asking that? I already explained I’m not claiming observations = no interactions in extensive detail and you turn around and ask me that gain.
- Comment on Electrons are easy 5 months ago:
Saying that observations are a special kind of interaction does seem to be privileging humans, though? What is different from measurements/observations and any other interaction?
- Comment on Electrons are easy 5 months ago:
That’s not what I’m saying. My point is just that observation = interaction has a lot of implications. Particles are always interacting, so if the wave function represented some absolute state of all systems, then the statement would just be incorrect because the wave function would be incapable of ever “spreading out” as it is constantly interacting with a lot of things.
The only way it can be made consistent is to then say that wave functions are not absolute things but instead describe something relative to a particular system, sort of like how in Galilean relativity you need to specify a coordinate system to describe certain properties like velocity of systems. You pick a referent object as the “center” of the coordinate system which you describe other systems from that reference frame.
You would have to treat the wave function in a similar way, as something more coordinate than an actual entity. That would explain why it can differ between context frames (i.e. Wigner’s friend), and would explain why you have to “collapse” it when you interact with something, as the context would’ve changed so you would need to “zero” it again kinda like tarring a scale.