Every time I need to cross a seemingly empty street, suddenly cars appear. I can’t help but imagine it’s a render distance issue.
Try to cross the street without turning your head. When you turn your head, they render the cars in the opposite directions.
/jk always look both ways before crossing the street.
Simulation theory is more or less a kind of modern creation myth, and creation myths are based around its societies current level of understanding of the world. In ancient times people explained the worlds actions and existence through gods and imaginative myths. When the scientific revolution happened people explained the universe in terms of immutable laws and cosmic logic. Now we are in the computational revolution, thus some people explain the worlds existence through computers. All untestable and unfalsifiable explanations for the nature of reality are as good as any other, so pick your poison and enjoy!
Simulation theory comes from solipsism, and it’s not that modern. According to Wikipedia it originated in Greece in 483–375 BC.
Every human is solipsist until about 2 years old, when they start to realize that the world is not revolving around them. It is called “crisis of 2 year old”, or “terrible twos”. Some people don’t get to go through this at 2, especially the children of billionaires, who have no reasons to think that they are not the center of the universe.
- The render distance (observable universe)
- The pixel size (Planck units)
- And the update rate (‘speed of light’ = speed of information being updated)
Calling Planck units “pixels” is extremely reductive. This is just naively applying video game concepts to physics with a poor understanding of both.
I took an entire graduate course in QM and a quantized Universe does, in fact, seem pixelated. That’s exactly how I explain it to people. There’s simply a finite level to how closely you can zoom in. Space, time, and energy are all quantized, and maybe even gravity though we haven’t figured that one out yet.
A finite level to how close you can zoom in is very different from pixels. Pixels (or voxels in this case) are indivisible elements of a larger whole that exist along an evenly spaced grid. The universe doesn’t have a Cartesian coordinate system measured in Planck lengths
I took an entire graduate course in QM and a quantized Universe does, in fact, seem pixelated. That’s exactly how I explain it to people. There’s simply a finite level to how closely you can zoom in.
isn’t the most recent explanation on planck’s length saying that we simply can’t observe further down, but it is hypothesised that smaller lengths actually exist?
According to some, assuming it’s even possible to fully simulate a universe to the degree that life in it can’t tell, then there should be multiple simulations running, so there would be more sim-universes than real ones, and odds would be high that any given universe you find yourself in would be a sim.
Personally I don’t buy it, I think if we were in a sim the laws of physics would have to be easily computable (they aren’t, see gluons) and I think it would take the computing power of an entire universe to simulate one of similar complexity at anywhere close to reasonable speed. (Note how emulators and virtual machines can only emulate a weaker system then the host system, at least at speeds comparable to native hardware)
there would be more sim-universes than real ones
This ties back to the mediocrity principle. If there are 10 billion people living on Earth, but 10 quadrillion living in simulations, the chances for you to live in the latter is much higher.
Along goes the simulation argument by Nick Bostrom. If simulation is possible, and practiced, we likely are simulated ourselves.
Isaac Arthur) noted that housing a population in a simulation is much more efficient than doing so physically. It seems like a convergent choice for powerful civilizations which want to maximize the life supported by fading stars (or energy potentials in general).
I think it would take the computing power of an entire universe to simulate one of similar complexity
Two objections:
- It might be sufficient to simulate the experience, without fully simulating the underlying physics. That’s how we do 3D games anyways. No one cares if we actually simulate individual air molecules. If the cloth moves indistinguishable as if, that’s as good as the original, for a much lower cost. You can also cull unobserved parts of the universe.
- Host and simulation can have completely unrelated laws of nature. Specifically, inhabitants of the simulation cannot study their host environment. As such, I think making assumptions about the host makes no sense.
Thanks for typing out what i was gonna say.
I am agnostic about simulation theory. If an advanced enough “something” can create a simulation undistinguishable from the lives we experience now then i would bet that we do live in one. But thats a big if and goes a bit further than one where life cant tell. (A simulated single cell organism is miles of from simulated mammals and society)
I’m not really a believer of the whole simulated universe theory, but I find your arguments against it weak.
You’re basing what is and isn’t easily calculatable off of our experiences. Same with “complexities of the universes”. However, if our world is indeed simulated, there’s no telling what the host universe is like. It might have crazy different math and be far far more complex than ours. Us trying to understand it would essentially be an excercise in futility.
You cannot disprove this hypothesis and it’s cool. Quite literally nothing can support it - if we live in a simulation, every part of the universe makes sense for us because we have no reference frame for “real” physics.
It’s just something fun to think about but ultimately it doesn’t matter, you have no way to find out.
