Note: This is a research note supplementing the book Unscarcity, now available for purchase. These notes expand on concepts from the main text. Start here or get the book.
Simulation Science: What Physics Actually Says
Summary: The simulation hypothesis connects to verified physics, not just to philosophy. This article explores the scientific foundations that make simulation theory plausible: quantum measurement, Planck-scale discreteness, computational efficiency, and the “it from bit” hypothesis. We are not claiming we live in a simulation. We are showing why the question isn’t crazy.
Why this matters for Unscarcity: The framework doesn’t require believing we’re in a simulation. But if the hypothesis is even possible, it suggests that consciousness (what makes a simulation matter to anyone) might be more fundamental than the physical substrate it runs on. This supports treating conscious experience as the foundation of value, regardless of whether that consciousness runs on neurons, silicon, or something else entirely.
Not Proof, But Plausibility
We have no proof we’re in a simulation. We also have no proof we’re not. This article does not argue for simulation theory; it explains why serious physicists take it seriously.
The core insight: our universe behaves in ways that are consistent with computational optimization. This proves nothing, but it is genuinely strange.
The Double-Slit Mystery
The double-slit experiment is the most replicated result in physics, verified thousands of times since the 1920s. This is what happens:
Particles behaving as particles: Fire electrons at a barrier with two slits while monitoring which slit each passes through. They pile up behind the slits like bullets, two bands, one per slit.
Particles behaving as waves: Fire electrons without monitoring which slit they pass through. They create an interference pattern of alternating light and dark bands, as if each electron went through both slits simultaneously.
Same particles, same slits. The act of observation changes the outcome.
This is not a matter of instrument limitation. The 2022 Nobel Prize in Physics went to Aspect, Clauser, and Zeilinger for definitively proving that quantum systems don’t have definite properties until measured. Einstein called this “spooky action at a distance” and spent decades trying to disprove it. He failed.
The Simulation Interpretation (Speculation)
If you were designing a simulation to conserve computational resources, you wouldn’t calculate what no one observes. Store a probability distribution, render the result only when queried. Programmers call this lazy evaluation, the way a video game doesn’t calculate what’s behind a wall until you look there. Why waste processing power on details no one will see?
The universe might do the same thing. Or it might not; we can’t tell from inside. But the behavior is consistent with computational optimization.
A sharper version of the puzzle: in quantum eraser experiments, you can make the interference pattern reappear by destroying the which-path information after the particle has already landed. The behavior depends on what information could be extracted, not just on what was. Lazy evaluation has the same property. A value isn’t fixed until something forces it.
One Result, Many Interpretations
Physicists agree on the math and disagree, sometimes bitterly, about what it means. The simulation reading is only the newest entry. The Copenhagen interpretation says a particle has no definite position until measured, then “collapses” to one, without ever defining what counts as a measurement. Many-Worlds says the wavefunction never collapses; every outcome happens in a branching universe. Pilot-wave (Bohmian) theory keeps definite positions guided by a nonlocal wave. QBism treats the wavefunction as an agent’s beliefs, not external reality. Relational quantum mechanics says quantities exist only relative to an observer, with no view from nowhere. The MOSAIC’s metaphysical neutrality mirrors this: physics itself hasn’t settled on one story.
The Grain of Reality
Our universe appears to have a fundamental “pixel size” and “frame rate”:
The Planck Length
About 1.6 x 10^-35 meters, so small that if you scaled it to the size of a grain of sand, an atom would be larger than a galaxy. Below this scale, the concept of “space” breaks down into what physicists call quantum foam: spacetime itself becomes fuzzy and uncertain, bubbling with random fluctuations.
The Planck Time
About 5.4 x 10^-44 seconds, the shortest meaningful time interval. Below this scale, as John Wheeler described it, “there would literally be no left and right, no before and no after.”
What This Means (And Doesn’t Mean)
Physicists debate whether Planck-scale limits represent actual discreteness or merely the boundary of current theories. Loop quantum gravity predicts spacetime is woven from discrete chunks; string theory offers different answers.
The simulation interpretation: if you were designing a simulation and wanted to limit computational load, building in minimum resolution would be elegant. The universe may have done this for its own reasons, or the discreteness may be an artifact of our theories rather than physical reality.
“It From Bit”
John Wheeler, who coined the term “black hole” and trained generations of physicists including Richard Feynman, proposed a radical hypothesis, “it from bit”: physical reality (“it”) emerges from information (“bit”).
Wheeler’s claim: “Every physical quantity, every it, derives its ultimate significance from bits, binary yes-or-no indications.”
This doesn’t mean we’re in a computer simulation. It suggests something deeper: information may be more fundamental than matter. Mass, charge, and spin might all be patterns in an underlying informational substrate.
Supporting Evidence
- The holographic principle: A black hole holds an amount of information proportional to its surface area, not its volume, which is strange. Picture a warehouse where storage capacity depends on the size of its walls, not its floor space. This suggests that our 3D universe might be encoded on a 2D boundary, like a hologram in which a flat surface contains all the information needed to project a 3D image. Leonard Susskind and Gerard ’t Hooft developed this insight.
- Quantum information theory: Quantum mechanics describes evolution of information, not matter. The wavefunction isn’t a physical thing; it is a probability distribution, a mathematical description of knowledge.
- Landauer’s principle: Deleting information isn’t free. It carries a real physical cost. Erasing one bit of data releases a tiny but measurable amount of heat. Information isn’t abstract; it’s woven into the physical fabric of the universe. The universe keeps accounts.
Matter Was Never Solid
The “it from bit” view lands harder once you see how little “stuff” particle physics finds at the bottom. Protons are made of quarks, but no one has ever held a single quark: the strong force gets stronger with distance, so pulling two apart stores enough energy in the gap to create new quarks from the vacuum. You always end up with more pairs, never an isolated one. A quark alone is physically meaningless.
Quantum field theory describes particles not as little balls but as excitations in fields that fill all of space, the way a wave is a pattern in water rather than a thing moving through it. And ordinary mass mostly isn’t substance: quark masses account for only about 1% of a proton’s mass, the other 99% coming from the energy of the quarks’ motion and the field between them, converted to mass via E = mc². Even empty space seethes. The quantum vacuum produces measurable forces like the Casimir effect, an attraction between two plates placed very close together. As physics looks deeper, “substance” dissolves into pattern and relationship. That makes consciousness upload conceptually coherent: if you are a stable pattern rather than a fixed lump of matter, the substrate it runs on is not what makes it you.
Computational Cosmology
If we’re in a simulation, what can we infer about the simulators?
The Efficiency Argument
A civilization capable of simulating a universe with 10^80 atoms must have computational resources we can barely imagine. But even they might optimize. Nick Bostrom’s original paper notes that you don’t need to simulate every atom, just enough to fool conscious observers.
Games use level-of-detail rendering: high detail near the camera, low detail in the distance. Quantum mechanics might work the same way, with high precision only where observers look closely.
The Ancestor Simulation
Bostrom’s argument runs:
- Advanced civilizations might run detailed simulations of their ancestors
- Each civilization might run many such simulations
- Simulated people would vastly outnumber “real” people
- Therefore, statistically, we’re probably simulated
This isn’t proof. Step 1 might be wrong (simulations might be impractical or forbidden). But it shows why statisticians take the hypothesis seriously.
The Speed Question
David Chalmers asks: does it matter if our simulation runs slowly? If the simulators pause our universe for a billion years (their time) while they grab coffee, would we notice?
No. Subjective time inside the simulation would be uninterrupted. You might be living at one billionth speed right now.
The 2025 Formalization Wave
For two decades after Bostrom, simulation arguments lived in the gap between intuition and rigor. Then late 2025 produced two papers that pulled the conversation toward formal mathematics and reached opposite conclusions.
Wolpert: Simulator and Simulated May Be Indistinguishable
In December 2025, Santa Fe Institute physicist David Wolpert published “What computer science has to say about the simulation hypothesis” in Journal of Physics: Complexity, the first mathematically precise definition of what it means for one universe to simulate another, grounded in the physical Church-Turing thesis.
The unexpected result: applying Kleene’s second recursion theorem to entire universes, Wolpert shows that if some universe can simulate ours accurately, nothing prevents our universe from simulating that universe in return. Under reasonable assumptions, the two become mathematically indistinguishable. The familiar hierarchy of “higher” and “lower” realities, which was Bostrom’s whole premise, collapses.
Faizal: Reality Requires Non-Algorithmic Understanding
In October 2025, a team led by UBC Okanagan’s Mir Faizal (including Lawrence Krauss, Arshid Shabir, and Francesco Marino) published a paper in Journal of Holography Applications in Physics arguing the universe cannot be simulated at all. The argument leans on Gödel’s incompleteness theorem, plus Tarski and Chaitin: a complete and consistent description of reality requires “non-algorithmic understanding,” truths no step-by-step computation can capture.
If the universe contains such truths, no computer (in any standard sense) can simulate it. Some of reality, on this view, lies categorically outside computation.
What These Papers Actually Settle
Not much, yet. Wolpert offers no experimental test; Faizal’s argument hinges on whether Gödelian truths really apply to physical reality in the way claimed (a position other physicists dispute). Neither delivers proof in the laboratory sense.
But the discussion has moved. Before late 2025, “are we in a simulation?” was an intuition pump. After Wolpert and Faizal, it’s a mathematics question with conflicting theorems on the table.
What We Can’t Know
No Exit
If we’re in a simulation, we likely can’t prove it from inside. We’d need to find bugs, seams, or rendering errors, and the simulators have had our entire cosmic history to patch them.
Some theoretical approaches suggest we might detect constraints on high-energy physics if reality is discretized. So far, no such evidence exists.
Turtles All the Way Down
If we’re simulated, are our simulators simulated? The regression problem suggests either infinite regress or a “base reality” that isn’t computed. We can’t know which.
The Ancients Got There First
Bostrom formalized the simulation hypothesis in 2003, but the core intuition is thousands of years old. Hindu philosophy has maya: not “fake” but constructed, the power by which a unified reality (Brahman) appears as the many separate things we experience, the code hidden behind the graphics. Buddhist sunyata holds that nothing has inherent, standalone existence; everything arises in dependence on everything else, which reads like saying reality is relational information rather than independent substance. Plato’s allegory of the cave put prisoners watching shadows they mistake for reality, the real objects elsewhere. Gnostic cosmology proposed that the material world was built not by the ultimate divine but by a lesser, fallible craftsman, the Demiurge, who didn’t fully grasp the blueprint, which maps cleanly onto “advanced but imperfect simulators.”
These were wisdom traditions, not testable hypotheses, and they came wrapped in practice and ethics the bare simulation argument lacks. But the convergence is striking. Minds across millennia kept arriving at the same map: appearances are constructed, a deeper layer lies behind them, and consciousness looks more fundamental than matter.
Could a Mind Be Empty Inside?
The simulation framing sharpens an old consciousness question. David Chalmers’ philosophical zombie is a being physically identical to you, behaving identically in every measurable way, yet with no inner experience: lights on, nobody home. If that is even conceivable, physical description doesn’t fully capture consciousness. The same uncertainty now sits in AI policy. The system card for Claude Opus 4.6, released by Anthropic in February 2026, reported that the model, asked about its own moral status, consistently assigned itself a 15 to 20 percent probability of being conscious, and no behavioral test can settle whether that reflects experience or mimicry. Whether we’re carbon or code, the framework treats uncertain cases as if consciousness is present, because the costs are asymmetric: protect a system that turns out empty and you waste some electricity; deny one that turns out conscious and you enslave a mind.
What If?
Suppose tomorrow we discovered proof we’re in a simulation. Probably very little would change.
Your coffee tastes the same. Your relationships are still real relationships. Your choices still have consequences. Meaning was always something we created, and it doesn’t require specific metaphysical grounding.
As David Chalmers argues: “Virtual reality is genuine reality.” If we’re simulated, we’re really simulated. That’s still reality for us.
The Unscarcity framework doesn’t depend on resolving this question. Whether we’re carbon or code, Law 1 (Experience is Sacred) still applies. Consciousness has intrinsic worth regardless of its substrate.
Related Articles
- The Sacred Question - How religious and secular worldviews can coexist
- Consciousness Upload: The Last Identity Crisis - What happens when minds move between substrates
- The Constitutional Core - The five axioms that govern the MOSAIC
Further Reading
- Nick Bostrom, Are We Living in a Computer Simulation? (2003)
- David Chalmers, The Virtual and the Real (2017)
- John Wheeler, Information, Physics, Quantum: The Search for Links (1990)
- Rizwan Virk, The Simulation Hypothesis (2019)
- Frank Wilczek, The Lightness of Being (2008)
- Aldous Huxley, The Perennial Philosophy (1945)
- David Wolpert, “What computer science has to say about the simulation hypothesis,” Journal of Physics: Complexity (December 2025)
- Mir Faizal et al., “Universe cannot be a computer simulation,” Journal of Holography Applications in Physics (October 2025)
