from io9 Website
“Like the appearance of silver in mother of pearl,
the world seems real
until the Self, the underlying reality,
“What Albert Einstein termed optical delusion,
Mohit K. Misra
There Is Some Hope That We Aren't Living Inside a Computer Simulation
Philosopher Nick Bostrom's famous Simulation
Argument suggests it's highly probable that we live inside a
supercomputer. But one philosopher takes this hypothesis to
task, arguing in a new paper that there are other post-human
scenarios that need to be taken into account.
If the first proposition is true, it's likely that we'll go extinct before reaching post-humanity (in which case there will be no so-called "ancestor simulations").
If the second is true,
This seems unlikely.
And it's here where philosopher Paul Franceschi from the University of Corsica in France takes issue with the argument.
But there's more to simulations than
just this, he argues - Bostrom failed to account for a much
broader class of post-human simulations.
To that end, Franceschi describes three other kinds of simulations:
Franceschi breaks down the assumption that we likely live in a simulation into three points:
But by virtue of his new post-human references classes, Franceschi argues that new conclusions can be produced:
By having alternate choices of different reference classes, and at a greater level of extension, different conclusions can be drawn from the premises - conclusions that produce reassuring conclusions.
Put another way, it can't possibly be correct that every post-human simulant is unaware of their true nature, or that other types of simulations don't exist.
In this context, he claims that the disturbing conclusion which is associated with the original argument turns out to be an arbitrary conclusion.
At the same time, there are several
other reference classes which have an equal degree of relevance
to the argument itself - reference classes which suggest a
We Live in a Computer Simulation
from io9 Website
In his paper, Bostrom offered very little science to support his hypothesis - though he did calculate the computational requirements needed to pull off such a feat. And indeed, a philosophical claim is one thing, actually proving it is quite another.
But now, a team of physicists say proof might be possible, and that it's a matter of finding a cosmological signature that would serve as the proverbial Red Pill from the Matrix. And they think they know what it is.
According to Silas Beane and his team at the University of Bonn in Germany, a simulation of the universe should still have constraints, no matter how powerful.
These limitations, they argue, would be observed by the people within the simulation as a kind of constraint on physical processes.
So, how could we ever hope to identify these constraints?
Easy: We just need build our own simulation of the universe and find out. And in fact, this is fairly close to what the physicists are actually trying to do. To that end, they've created an ultra-small version of the universe that's down to the femto-scale (which is even smaller than the nano-scale).
And to help isolate the sought-after signature, the physicists are simulating quantum chromodynamics (QCD), which is the fundamental force in nature that gives rise to the strong nuclear force among protons and neutrons, and to nuclei and their interactions.
To replace the space-time continuum, they are computing tiny, tightly spaced cubic "lattices." They call this "lattice gauge theory" and it is subsequently providing new insights into the nature of matter itself.
Interestingly, the researchers consider their simulation to be a forerunner to more powerful versions in which molecules, cells, and even humans themselves might someday be generated. But for now, they're interested in creating accurate models of cosmological processes - and finding out which ones might represent hard limits for simulations.
To that end, they have investigated the Greisen-Zatsepin-Kuzmin limit (or GZK cut-off) as a candidate - a cut-off in the spectrum of high energy particles. The GZK cut-off is particularly promising because it behaves quite interestingly within the QCD model.
According to the Physics arXiv blog, this cut-off is well known and comes about when high energy particles interact with the cosmic microwave background, thus losing energy as they travel long distances.
The researchers have calculated that the lattice spacing imposes some additional features on the spectrum, namely that the angular distribution of the highest energy components should exhibit cubic symmetry in the rest of the lattice (causing it to deviate significantly from isotropy).
And that would be the kind of reveal the physicists are looking for - an indication that there is indeed a man hiding behind the curtain.
And what's particularly fascinating about this is that we can make this measurement now with our current level of technology. As the researchers point out, finding this effect would be the same as 'seeing' the orientation of the lattice on which our own universe is simulated.
That said, the researchers caution that future computer models may utilize completely different paradigms, ones that are outside of our comprehension. Moreover, this will only work if the lattice cut-off remains consistent with what we see in nature.
At any rate, it's a remarkable suggestion - one that could serve as an important forerunner to further research and insights into this fascinating possibility.
The entire study (Constraints on the Universe as a Numerical Simulation) can be found at Physics arXiv.