And here I was waiting to get unplugged, or maybe finding a Nokia phone that received a call.

  • survirtual@lemmy.world
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    3 hours ago

    This paper is shit.

    https://jhap.du.ac.ir/article_488_8e072972f66d1fb748b47244c4813c86.pdf

    They proved absolutely nothing.

    For instance, they treat physics as a formal axiomatic system, which is fine for a human model of the physical world, but not for the physical world itself.

    You can’t say something is “unprovable” and make a logical leap to saying it is “physically undecidable.” Gödel-incompleteness produces unprovable sentences inside a formal system, it doesn’t imply that physical observables correspond to those sentences.

    I could go on but the paper is 12 short pages of non-sequiturs and logical leaps, with references to invoke formality, it’s a joke that an article like this is being passed around and taken as reality.

  • kalkulat@lemmy.world
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    13 hours ago

    Oh those mathers. At least scientists are humble enough to recognize that theorums about the physical world can’t be proven.

  • mhague@lemmy.world
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    20 hours ago

    “If we assume X theorem is true, Y theorem is true, and lemma Z is true, then …”

    This is actually about our models and seeing their incompleteness in a new light, right? I don’t think starting from arbitrary axioms and then trying to build reality was about proving qualities about reality. Or am I wrong? Just seems like they’re using “simulated reality” as a way to talk about our models for reality. By constructing a “silly” argument about how we can’t possibly be in a matrix, they’re revealing just how much we’re still missing.

  • Geodad@lemmy.world
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    16 hours ago

    It’s possible that the universe could be simulated by an advanced people with vastly superior technology.

    Hard solipsism has no answer and no bearing on our lives, so it’s best to not give it another thought.

    • arendjr@programming.dev
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      It’s possible yes, but the nice thing is that we know we are not merely talking about “advanced people with vastly superior technology” here. The proof implies that technology within our own universe would never be able to simulate our own universe, no matter how advanced or superior.

      So if our universe is a “simulation” at least it wouldn’t be an algorithmic one that fits our understanding. Indeed we still cannot rule out that our universe exists within another, but such a universe would need a higher order reality with truths that are fundamentally beyond our understanding. Sure, you could call it a “simulation” still, but if it doesn’t fit our understanding of a simulation it might as well be called “God” or “spirituality”, because the truth is, we wouldn’t understand a thing of it, and we might as well acknowledge that.

      • jj4211@lemmy.world
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        10 hours ago

        But that sounds like disproving a scenario no one claimed to be the case: that everything we perceive is as substantial as we think it is and can be simulated at full scale in real time by our own universe.

        Part of the whole reason people think of simulation theory as worth bothering to contemplate is because they find quantum physics and relativity to be unsatisyingly “weird”. They like to think of how things break down at relativistic velocities and quantum scale as the sorts of ways a simulation would be limited if we tried, so they like to imagine a higher order universe that doesn’t have those pesky “weird” behaviors and we are only stuck with those due to simulation limits within this hypothetical higher order universe.

        Nothing about it is practical, but a lot of these science themed “why” exercises aren’t themselves practical or sciency.

        • arendjr@programming.dev
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          I’m not sure I agree with the “no one claimed” part, because I think the proof is specifically targeting the claim that it is more likely than not that we are living in a simulation due to the “ease of scaling” if simulated realities are a thing. Which I think is one of the core premises of simulation theory.

          In any case, I don’t think the reasoning only applied to “full scale” simulations. After all, let’s follow the thought experiment indeed and presume that quantum mechanics is indeed the result of some kind of “lazy evaluation” optimisation within a simulation. Unless you want to argue solipsism in addition to simulation theory, the simulation is still generating perceptions for every single conscious actor within the simulation, and the simulation therefore still needs to implement some kind of “theory of everything” to ensure all perceptions across actors are being generated consistently.

          And ultimately, we still end up with the requirement that there is some kind of “higher order” universe whose existence is fundamentally unknowable and beyond our understanding. Presuming that such a universe exists and manages our universe seems to me to be a masked belief in creationism and therefore God, while trying very hard to avoid such words.

          The irony is that the thought experiment started with “pesky weird behaviours” that we can’t explain. Making the assumption that our “parent universe” is somehow easier to explain is really just wishful thinking that’s as rational as wishing a God to be responsible for it all.

          I’ll be straight here: I’m a deist, I do think that given sufficient thought on these matters, we must ultimately admit there is a deity, a higher power that we cannot understand. We may as well call it God, because even though it’s not a religious idea of God, it is fundamentally beyond our capacity to understand. I just think simulation theory is a bit of a roundabout way to get there as there are easier ways to reach the same conclusion :)

        • Tattorack@lemmy.world
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          2 hours ago

          Just blaming god again for all the unexplainable stuff. Only instead if god it’s a simulation.

  • sonofearth@lemmy.world
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    22 hours ago

    The uptime is too good to be a simulation. It has an uptime of like 14 billions years! AWS has a lot of catching up to do. /s

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    I thought the rebuttal to this was covered in ‘The Thirteenth Floor’. They don’t have to simulate the entire universe, and it doesn’t have to be consistent. Just the parts that the PCs are looking at.

    I’m not even going to mention what tricks they can do with the rewind button.

    Anyways this paper was likely written by an NPC.

    • tal@lemmy.today
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      I mean, it’s a bunch of technical gobledygook from different fields in an Iranian journal dealing with holography claiming extraordinary results.

      Reminds me of the Bogdanov affair.

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    Dr. Faizal says the same limitation applies to physics. “We have demonstrated that it is impossible to describe all aspects of physical reality using a computational theory of quantum gravity,” he explains.

    “Therefore, no physically complete and consistent theory of everything can be derived from computation alone.”

    Your argument is bad and you should feel bad.

    Impossible to describe does not mean that it’s not possible to simulate, and impossible is an incredibly strong criterion that sounds quite inaccurate to me. We simulate weather systems all the time, even though the systems are fundamentally chaotic and it’s impossible to forecast accurately. We don’t even know that gravity is quantum, so that’s quite a weird starting point but we’ll ignore that for a second. What is this argument?

    This seems like a huge leap to conclude that just because some aspects of our understanding seem like we wouldn’t be able to fully describe them somehow means that the universe can’t be simulated.

    “Drawing on mathematical theorems related to incompleteness and indefinability, we demonstrate that a fully consistent and complete description of reality cannot be achieved through computation alone,” says Dr. Faizal.

    Who’s to say that reality is completely defined? Perhaps there are aspects to what we consider the real universe that are uncertain. Isn’t that foundational to quantum mechanics?

    • squaresinger@lemmy.world
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      What bothers me most is that they equate a model with reality.

      Quantum gravity theory is our current working model that we use to describe our observations. It’s not reality itself, and no scientist worth their money would claim that it is, because if it was, physics would be solved and it isn’t.

      That’s how science works: We have observations, we build models to describe them, then we have more observations that don’t fit the old models, so we build newer models that also describe the new observations. Since we aren’t omnicient, there’s always something we can’t observe (yet) and what we can’t observe we also can’t describe.

      “Therefore, no physically complete and consistent theory of everything can be derived from computation alone.”

      This, in fact, would fit quite well to an imperfect simulation that doesn’t perfectly follow all the rules we made up when observing.

    • phutatorius@lemmy.zip
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      We simulate weather systems all the time, even though the systems are fundamentally chaotic and it’s impossible to forecast accurately.

      The amount of computer power used to run those simulations is immense, and even then, the predictive capacity of those models starts degrading rapidly around 7 to 10 days ahead. There’s some amazing science that goes into those models, but the results are hard-won. And what we know about more energetic systems (say, the magnetohydrodynamics of the sun) is far less comprehensive.

      And be careful with that “fundamentally chaotic” assertion: there are degrees of how chaotic a system is, and some aspects of a system can be more deterministic than others.

    • magic_lobster_party@fedia.io
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      We simulate weather systems all the time, even though the systems are fundamentally chaotic and it’s impossible to forecast accurately.

      Weather simulations are approximations. It’s not an exact replication of the universe.

        • magic_lobster_party@fedia.io
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          Then it’s not an approximation - it’s the reality. The question is whether all things the universe does can also a computer do in theory. If one thing about the universe is uncomputable, then the entire universe is uncomputable.

          The paper suggests this thing is quantum gravity. I have my doubts about it, but I’m in no position to refute the paper.

      • Valmond@lemmy.world
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        But who sait it must be a perfect match?

        I mean they can argue that we can’t simulate correctly the universe (just check kaos theory) but that doesn’t mean we cant simulate a universe. Even a universe that looks feels like ours.

        • magic_lobster_party@fedia.io
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          The paper makes the argument that the universe we live in is mathematically uncomputable. No algorithm can describe it. There’s no mathematical formula we can use to compute the universe as it is.

          If this is the case, then we don’t live inside a computer. Something more than pure computation is required.

          Now their argument is that quantum gravity is the thing that makes the universe uncomputable. I’m not sure how valid this part of their argument is.

          • AwesomeLowlander@sh.itjust.works
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            9 hours ago

            If this is the case, then we don’t live inside a computer. Something more than pure computation is required.

            SO many assumptions in that statement

            • magic_lobster_party@fedia.io
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              4 hours ago

              Well, ”computer” in the mathematical sense is well defined of what it can and cannot do. The limit is the halting problem or equivalent problems.

              The question is: is there some equivalent to the halting problem in the real universe? If that’s the case, then there’s no algorithm you can use to describe the entire universe.

              • AwesomeLowlander@sh.itjust.works
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                4 hours ago

                ”computer” in the mathematical sense is well defined of what it can and cannot do.

                It is in this universe. Who’s to say the same holds remotely true in a different universe that may have entirely different laws of physics?

  • polle@feddit.org
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    22 hours ago

    Lol. They forgot that thermodynamics existed? If they remembered they were already done before they started.

  • Lung@lemmy.world
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    This is such a boring take, I wonder how anyone gets funding or publication making a statement as useless as “see godels incompleteness theorem that proves that there’s more truth than what mathematics can prove, therefore reality is not a simulation”. Yes, we know, you don’t need a PhD to know the major theorem that took down the entire school of logical positivism. The fundamental philosophical error here is assuming that all forms of simulation are computational or mathematical. Counterexample: your dreams are a form of simulation (probably). So I can literally disprove this take in my sleep

    • NoneOfUrBusiness@fedia.io
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      The fundamental philosophical error here is assuming that all forms of simulation are computational or mathematical.

      Uh… that’s literally what a simulation is.

      Counterexample: your dreams are a form of simulation (probably). So I can literally disprove this take in my sleep

      But dreams aren’t simulating reality as we observe it; they just kinda do their own thing. Your brain isn’t consistently simulating quantum mechanics (or, hell, even simple things like clocks) while you’re dreaming so this is a moot point.

      • Lung@lemmy.world
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        People who are lucid dreaming simulate a full reality that’s nearly indistinguishable from the one they find themselves in during waking time. If your brain can’t tell the difference during this time, how can you be sure you’re not dreaming right now reading this?

        The scope of what a simulation is has always been limited by the technology we know. It is only a failing of imagination and knowledge to assume that algorithmic computation is the only valid form of simulation in the future, these have existed for barely 100 years, but even Plato’s cave was talking about the larger philosophical problem

        • FauxLiving@lemmy.world
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          People who are lucid dreaming simulate a full reality that’s nearly indistinguishable from the one they find themselves in during waking time.

          You’re not describing a simulation, you’re describing a perception. A person perceives that they’re seeing an indistinguishable reality, but we know that people’s brains do not have the computational power to simulate molecular motion in even a cubic centimeter of air.

          Or, if they look at the stars, are they then simulating an infinite space with infinite mass and all of the associated interactions inside of their finite brain? Of course not, that would be impossible.

          Dreams are perceptions, not simulations.

          • Lung@lemmy.world
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            11 hours ago

            The mind while lucid dreaming is creating a whole environment, which for some people has incredible level of detail. Your “consciousness” is experiencing a whole video game or whatever, which must be simulated to be percieved. Imagine you had some kind of really advanced VR setup and body suit that could touch your senses very richly - something must be feeding that perception, a simulation

            • FauxLiving@lemmy.world
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              8 hours ago

              Our brains build a model of the world inside of our head, that’s what we experience.

              Those same processes can generate output that isn’t there, we can hallucinate. This is what we’re doing when we’re dreaming. We’re not simulating a world it is computationally impossible.

              To perfectly simulate a volume the size of your bedroom for even a few minutes would take millions of years of compute time. That is not happening inside your brain.

        • henfredemars@infosec.pub
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          I take issue with completeness in a very similar way. For example, imagine for some reason that in the simulation it’s impossible to think about penguins. Let’s say that penguins are so logically incomprehensible that we cannot implement this.

          The implementation of the simulation could simply trap any attempt to think about penguins and replace it with something else. We would be none the wiser. The simulation still works even if there are states that we can’t get to or are undefined.

          It could be that reality itself isn’t entirely complete and defined everywhere. Who’s to say this isn’t one big dream and that the sky isn’t there if we all stopped looking?

          There is no escape from Plato‘s cave.

        • Brave Little Hitachi Wand@feddit.uk
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          1 day ago

          A lucid dream does not fully simulate anything, it is an altered state that includes the subjective apprehension of verisimilitude. Perceptions and apprehensions, even outside of altered states, do not constitute proof of anything.

        • TheFogan@programming.dev
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          While I’m far from an expert on it… at best the dream simulations are still, extremely rudimentary. To the point that’s usually how you can tell it isn’t real by doing something like reading a book. IE it’s largely believable, but only because you are put in a gullible state. Like watching 2 year old AI videos, while stoned.

    • magic_lobster_party@fedia.io
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      Counterexample: your dreams are a form of simulation (probably). So I can literally disprove this take in my sleep

      Dreams are an approximation of reality at best. It’s not a perfect simulation.

        • magic_lobster_party@fedia.io
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          My bad. Of course you’re right.

          I’ve dreamt that levitation is possible. Therefore, levitation is possible in reality. QED

          • Übercomplicated@lemmy.ml
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            1 day ago

            The question is rather What is “reality”: the dream (et al.) or the physical world (what you describe as reality). See Descartes first two meditations (and note that he relies fully on the existence of God to prove the existence of reality later). In this case, us experiencing a “dream” just serves to outline the point; Descartes, for example, also suggests that we are being fooled by an evil daemon. If it’s a dream or an evil daemon — doesn’t matter; it would likely be something entirely beyond our comprehension anyway. But genuinely proving the physical world as being reality is very difficult.

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    I was under the impression that something along these lines was already accepted from the perspective of information theory. I.e. a machine that could simulate the universe must at least be composed of as much information as the universe itself. Given the vastness and complexity of the universe, this would make it rather unlikely that the universe is simulated. Unless you want to view the universe itself as a machine that calculates it’s own progression. But that is a bit of a semantic point.

    Disclaimer: this is not my area of expertise and I probably got some terms or concepts wrong. I am basing this off of ‘The information’ by James Gleick

    • lemmeLurk@lemmy.zip
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      But you wouldn’t have to simulate the whole universe, only one brain. There is no way for you to know, if everything your brain experiences is caused by it actually happening, or just the neutrons being triggered in that way from outside.

    • Victor@lemmy.world
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      I mean, maybe the machine is five-dimensional and has no problem containing all the information of a three-dimensional universe? I don’t know, yadda yadda talking out of my ass.