I recently watched an episode of The Infographics Show that fascinated me. It had the sensational title of “Holy sh*t spacetime is fake…” Because I don’t trust YouTube videos, I run them by Gemini, the AI I use. Below is the video, and then the transcript of my discussion with Gemini. It was quite intriguing.

I have serious worries about how AI will impact our society. One impulse is to boycott AI. Other feelings suggest I should try to understand it. This transcript shows how I’m working with AI. It’s very science fictional.

I do have a typographical problem. I’m experimenting with WordPress’s limitations to clearly show when I’m talking and when the AI is replying. Let me know if this works. I’ll use plain text and let the AI handle advanced formatting.

This is a lot to read, but it’s very detailed and revealing. It also says a lot about learning science with YouTube videos.

I plan to study the AI’s reply and read some of its book recommendations. I highly recommend watching the video and reading this transcript. It works on many levels. The video comes about as close as it gets to answering that old question: “Why are we here?” Of course, we can never know the answer, at least not in this existence. And the answers given are from science. Not religion or philosophy.

What can you tell me about the assertions of this video?

https://youtu.be/HTYIKPcPRRQ?is=3UlylaMpvXLdH3tI

And what can you tell me about this channel?

The video “Holy sh*t spacetime is fake…” (from the YouTube channel The Infographics Show, available at https://youtu.be/HTYIKPcPRRQ) explores the conflict between Einstein’s local realism and quantum mechanics, using actual quantum optics experiments to draw existential conclusions about determinism and the fabric of spacetime.

Core Assertions of the Video

The video builds an argument progressing from historical quantum debates to modern cosmology and quantum gravity:

  1. The Fall of Einstein’s “Local Realism”:
  • Einstein assumed nature follows local realism—that objects possess definite properties independent of observation, and influences cannot travel faster than light [00:41].
  • The video explains that quantum entanglement violates these assumptions, which Einstein famously rejected as “spooky action at a distance” [02:04].
  1. Closing the Experimental Loopholes:
  • It details the progression of Bell test experiments designed to test Bell’s theorem, noting how earlier tests were questioned due to the detection loophole and the locality loophole [03:43].
  • By 2015, researchers performed “loophole-free” Bell tests, statistically disproving local hidden variable theories [04:35].
  1. The “Cosmic Bell Test” and the Freedom of Choice Loophole:
  • To close the freedom-of-choice / measurement-independence loophole (the idea that detector settings might somehow be correlated with particle states in advance) [05:19], a 2018 experiment led by Anton Zeilinger and collaborators used light from distant quasars (7.8 and 12.2 billion light-years away) as cosmic random number generators [06:34].
  • Because quantum correlations persisted even when detector settings were chosen by ancient quasar light, it pushed back any classical causal link to the early universe [08:21].
  1. The Resulting Dilemma: Spacetime as Emergent vs. Superdeterminism:
  • Superdeterminism: The video asserts that if one insists Einstein was right and reality is strictly local, the universe must be “superdeterministic”—meaning everything (including experimental choices and measurements) was hard-coded at the Big Bang, eliminating human free will and scientific independence [09:22].
  • Spacetime is Emergent / Fake: If superdeterminism is rejected (as most physicists do), then locality fails. If spatial distance does not restrict quantum information, the video argues that 3D spacetime is not fundamental [12:40]. Instead, like temperature is an emergent macroscopic property of kinetic energy, spacetime is an emergent phenomenon arising from underlying quantum entanglement networks, connecting this to concepts like the Holographic Principle [13:57].

Scientific Grounding vs. Sensationalism

  • What is accurate: The historical timeline (Einstein vs. Bohr, Bell’s inequalities, Aspect’s tests, the 2015 loophole-free tests, and the 2018 Canary Islands “Cosmic Bell Test” utilizing quasar light) accurately reflects real experimental physics. The philosophical trade-off between giving up locality, counterfactual definiteness, or statistical independence (superdeterminism) is standard in interpretations of quantum mechanics.
  • What is dramatized: The framing that “spacetime is fake” or that physics has “disproven free will” is an exaggerated, sensationalist pitch. In theoretical physics (such as AdS/CFT correspondence and quantum gravity), spacetime is often hypothesized to be emergent rather than fundamental—which is not the same as being an “illusion” or “fake” in day-to-day physical reality.

About the Channel: The Infographics Show

  • Profile & Scope: The Infographics Show is a massive, high-volume educational and infotainment animation channel founded in 2011. It covers a wide spectrum of topics, including military conflicts, true crime, hypothetical scenarios (“What If”), history, and popular science.
  • Format: Videos rely on fast-paced, vector-animated motion graphics paired with dramatic voiceover narration designed to maximize audience engagement and retention.
  • Reputation & Editorial Style:
  • Content-Mill Pacing: Because the channel publishes videos on a near-daily schedule across wildly varying disciplines, depth of research varies considerably.
  • Sensationalized Framing: Video titles, thumbnails, and script hooks frequently lean into clickbait and existential drama (e.g., using terms like “terrifying,” “mind-bending,” and “Holy sh*t…”).
  • General Accuracy: For general overviews, it provides accessible introductions to complex topics, but it is frequently criticized by domain experts (in history, defense, and hard sciences) for oversimplifying nuances, occasionally relying on secondary internet summaries, and trading technical precision for entertainment value.
What books, documentaries, and videos could I use to better understand the subjects of this video?

To dig into the actual physics behind the video—stripping away the clickbait drama while preserving the genuine mathematical and philosophical weirdness—here are the best books, documentaries, and video lectures broken down by the specific concepts covered:

1. Books

On Entanglement, Non-Locality, and the Demise of Spacetime

  • Spooky Action at a Distance by George Musser (Farrar, Straus and Giroux)
  • Why it fits: This is the definitive popular science book directly addressing the core theme of the video. Musser explores non-locality from Einstein and Bell to modern quantum gravity, interviewing top physicists on why non-locality suggests that spacetime is not fundamental, but emergent.
  • What Is Real? The Unfinished Quest for the Meaning of Quantum Physics by Adam Becker (Basic Books)
  • Why it fits: Provides the rich historical context of the Bohr–Einstein debate, John Stewart Bell’s breakthrough in Northern Ireland, and how experimentalists like John Clauser and Alain Aspect were initially treated as fringe thinkers before their work won the 2022 Nobel Prize in Physics.
  • Dance of the Photons: From Einstein to Quantum Teleportation by Anton Zeilinger (Farrar, Straus and Giroux)
  • Why it fits: Written directly by the Nobel laureate featured in the Canary Islands Cosmic Bell Test. Zeilinger explains entanglement, Bell’s inequalities, and optical experiments using an accessible, narrative approach.

On Emergent Spacetime and Quantum Gravity

  • Something Deeply Hidden: Quantum Worlds and the Emergence of Spacetime by Sean Carroll (Dutton)
  • Why it fits: Carroll explains how physical space, geometry, and distance can emerge mathematically from quantum entanglement (specifically through Hilbert space and the AdS/CFT correspondence/holographic principle).
  • Existential Physics: A Scientist’s Guide to Life’s Biggest Questions by Sabine Hossenfelder (Viking)
  • Why it fits: Hossenfelder is one of the few prominent theoretical physicists who actively researches and defends superdeterminism. She breaks down the “measurement-independence” loophole, what it actually means for free will, and why she believes discarding locality without scrutinizing determinism is premature.

2. Documentaries & In-Depth Video Series

Documentaries

  • NOVA: The Fabric of the Cosmos (PBS, Hosted by Brian Greene)
  • Episode: “Quantum Leap” & “What is Space?”
  • Focus: Visualizes Bell’s theorem, entanglement, and how Einstein’s smooth, geometric picture of general relativity breaks down at subatomic scales.
  • Space and Time Might Be an Illusion (PBS NOVA)
  • Available at: https://youtu.be/RCehjcdvm1Y
  • Focus: A deep dive into modern theoretical physics exploring whether spacetime is an emergent property rather than a fundamental arena.

Targeted Video Deep-Dives (PBS Space Time with Dr. Matt O’Dowd)

PBS Space Time handles the exact topics from the Infographics video with full mathematical and conceptual rigor:

  1. On the Bell Experiments & the 2022 Nobel Prize:
  • “Why Did Quantum Entanglement Win the Nobel Prize in Physics?” (https://youtu.be/US7fEkBsy4A)
  • Explains Bell’s inequalities, Aspect’s and Zeilinger’s setups, and why local hidden variable theories are experimentally ruled out.
  1. On the Superdeterminism Dilemma:
  • “What If We Live in a Superdeterministic Universe?” (https://youtu.be/JnKzt6Xq-w4)
  • Breaks down the exact loophole the Canary Islands quasar experiment tested: what happens if the universe lacks statistical independence.
  1. On Emergent Spacetime:
  • “Is Spacetime Fundamental, or is it Emergent?” (https://youtu.be/Gg2bn5_2EKY)
  • Discusses how entanglement networks can mathematically generate spatial geometry without requiring physical space to exist a priori.

3. The Original Canary Islands Experiment

If you want to examine the primary source referenced in the video (the 2018 experiment using quasars):

  • Paper: “Cosmic Bell Test Using Random Measurement Settings from High-Redshift Quasars” (Published in Physical Review Letters, August 2018; Authors: Rauch, Zeilinger, Kaiser, Guth, et al.).
  • MIT News Overview: MIT published a clear, accessible lay-summary of the experiment titled “Light from ancient quasars helps confirm quantum entanglement” (August 2018), which explains the exact mechanics of using 7.8 and 12.2 billion-year-old photon colors to set the polarizing filters.

Which do you think might be true, sxperdeterminism or spacetime is emergent?

Between the two, emergent spacetime is by far the more promising, mathematically fruitful, and widely accepted candidate among theoretical physicists.

While both ideas sound radical on the surface, they sit on very different footings when it comes to how physics progresses.

Why “Emergent Spacetime” Has the Stronger Case

When physicists say spacetime might be “emergent,” they don’t mean the physical universe is an imaginary illusion. Rather, they mean that space and time are macroscopic phenomena built out of more fundamental, non-spatial degrees of freedom—in the exact same way that temperature, wetness, or pressure are real macroscopic properties that emerge from the collective motion of atoms. A single water molecule isn’t “wet,” and a single atom doesn’t have a “temperature”; those concepts only become meaningful once you have an ensemble.

Emergent spacetime has substantial mathematical support across multiple active research programs:

  • Dualities and Holography (AdS/CFT): Juan Maldacena’s anti-de Sitter / Conformal Field Theory correspondence showed mathematically that a gravitational system with curvature and spatial depth (bulk spacetime) can be completely equivalent to a quantum theory living on a lower-dimensional boundary with no gravity at all.
  • “ER = EPR”: Proposed by Juan Maldacena and Leonard Susskind, this conjecture links Einstein-Rosen bridges (wormholes, or geometric connectivity) directly to Einstein-Podolsky-Rosen pairs (quantum entanglement). The working intuition is that quantum entanglement is the literal “glue” stitching together the geometry of space.
  • Resolving the Singularity: General relativity predicts its own demise at singularities (the center of black holes and the instant of the Big Bang), where curvatures become infinite. If spacetime itself is just a coarse-grained approximation that dissolves into pure quantum information at Planckian scales, the infinities vanish naturally.

Emergent spacetime doesn’t break how science works; it simply treats space and time as derivative rather than fundamental building blocks.

The Problem with Superdeterminism

Superdeterminism proposes that the universe preserves Einstein’s local realism by abandoning statistical independence (the “measurement independence” assumption). In this view, when an experimentalist chooses to measure a photon at angle $A$ instead of angle $B$, that choice and the photon’s hidden state were already correlated via initial conditions established at the Big Bang.

While logically impossible to completely rule out mathematically, it faces severe objections from the wider physics community:

  1. The Methodological Dead End: Science relies fundamentally on the idea of control and independence—that you can run an experiment, vary a parameter, and compare it against a control without assuming the apparatus and the sample share a hidden, fine-tuned conspiracy from 13.8 billion years ago. If you discard statistical independence to save classical locality, you undermine the validity of the scientific method itself.
  2. Fine-Tuning: To explain why Bell tests consistently match quantum predictions across billions of light-years (as in the quasar tests), the initial state of the Big Bang would have had to be orchestrated with unimaginable precision just to fool our detectors into seeing quantum statistics.
  3. Lack of Predictive Power: Proponents of superdeterminism (like Sabine Hossenfelder or Gerard ‘t Hooft) have attempted to formulate toy models, but so far superdeterminism has produced virtually no new verifiable predictions or unified frameworks that solve outstanding problems like quantum gravity.

The Realistic Picture

Superdeterminism feels like an attempt to rescue a 19th-century mechanical intuition (classical local realism) at the cost of rendering empirical science untestable.

By contrast, treating spacetime as an emergent network of quantum information preserves the empirical integrity of quantum mechanics while offering a tangible, mathematically rigorous path toward uniting general relativity with quantum theory. If physics has to surrender one of its classical assumptions, abandoning the fundamental nature of empty geometry is vastly more productive than abandoning the independence of experiment.

Can’t we consider our spacetime an emergent phenomenon of the quantum world without having the same properties of the quantum world?

That is not just possible—it is the central premise of how emergence works across all of physics. Emergent phenomena routinely display properties that simply do not exist in the underlying constituents.

When a higher-level structure emerges from a lower-level substrate, the microscopic rules almost never survive intact into the macroscopic description.

The Standard Rule of Emergence: Novel Properties, Lost Rules

Nature is layered with emergence where the macro-world behaves by completely different laws than the micro-world:

  • Fluid Dynamics vs. Particle Physics: Water is wet, flows continuously, supports vortices, and obeys the Navier-Stokes equations. A single $\text{H}_2\text{O}$ molecule has no “viscosity,” no “wetness,” and no continuous density. It is governed purely by discrete quantum electrodynamics.
  • Thermodynamics vs. Mechanics: The Second Law of Thermodynamics (the irreversible arrow of time and entropy increase) emerges from microscopic particle collisions that are, at their core, strictly time-reversible. The fundamental laws don’t distinguish past from future, yet the emergent macroscopic world clearly does.
  • Solids and Rigidity: A diamond is rigid and holds a definite shape, yet the carbon atoms inside are point-like nuclei surrounded by electron probability clouds that are almost entirely empty space. The property of “impenetrable hardness” belongs only to the collective structure, not the atoms.

Why Spacetime Would Differ from the Quantum Substrate

If spacetime emerges from quantum entanglement and information states, there is no requirement—and indeed no physical expectation—that spacetime should look or act “quantum” at everyday scales:

  1. Continuous Smoothness from Discrete Data:In theories like Loop Quantum Gravity, Causal Dynamical Triangulations, or tensor networks in AdS/CFT, the underlying degrees of freedom are discrete: quantum bits (qubits), graph nodes, or entangled links. Yet, across vast ensembles ($10^{60}$ or more interactions per cubic centimeter), those discrete information exchanges average out into a smooth, seamless continuum—precisely what Einstein modeled with pseudo-Riemannian geometry.
  2. Definite Locality from Non-Local Entanglement:The quantum realm is famously non-local: two entangled photons can correlate across light-years without a signal passing between them. But when trillions of particles decohere and become entangled with their wider environment, quantum decoherence suppresses interference terms. The quantum cloud of superpositions collapses into classical, definite probabilities. A local “neighborhood” emerges: objects take on distinct coordinates, and classical causality (nothing traveling faster than light in the emergent medium) takes hold.
  3. Linear Time from a Timeless State:In several formulations of quantum gravity (such as the Wheeler-DeWitt equation, often described as $H\Psi = 0$), the universe as a whole does not evolve against an external clock; the equation is fundamentally timeless. Classical, forward-moving time can emerge internally via entanglement between a “subsystem” (an observer or clock) and the rest of the universe (the Page-Wootters mechanism). Time becomes an emergent measure of correlation changes, not a fundamental quantum primitive.

The Computer Screen Analogy

Think of an image on an OLED monitor:

  • At the fundamental level, there are millions of red, green, and blue diodes blinking discrete voltages on and off according to binary logic.
  • On the screen, you see a smooth, moving picture of a baseball flying through the air, obeying classical parabolic motion.

The baseball has properties like “shape,” “smooth trajectory,” and “velocity” that do not belong to the individual subpixels. Conversely, the individual diodes possess quantum semiconductor bandgaps that the macroscopic baseball completely ignores.

Spacetime is the image on the screen. The smooth fabric of space, the tick of a clock, and the speed limit of light ($c$) are the collective, coarse-grained macroscopic behaviors of an underlying quantum information network that itself has neither distance nor time.

I think you are agreeing with the intent of my statement and I must have phrased it incorrectly because what you replied is what I wondered. 

For example, in the quantum world entanglement works faster than the speed of light. But in spacetime nothing exceeds the speed of light. So is there really a conflict if the rules of one realm of reality don’t match the rules of another realm?

You didn’t phrase it incorrectly at all; you’ve put your finger on the central intuition that drives modern theoretical physics.

To answer your question directly: No, there is no physical conflict—provided we understand that the speed of light is a property of the emergent fabric, not a constraint on the underlying quantum substrate.

The appearance of a “conflict” was mostly a historical accident of how the theories were discovered, combined with an intuitive misunderstanding of what the speed of light ($c$) actually governs.

1. Entanglement Does Not Actually “Travel”

The classic phrasing that entanglement works “faster than the speed of light” is technically a misnomer that causes much of the confusion.

For something to travel faster than light, it would have to cross space: leave Point A at time $t_1$, traverse the intervening meters, and arrive at Point B at time $t_2$, where distance divided by time exceeds $c$.

Entanglement doesn’t do that:

  • No physical signal crosses the gap. There is no particle, wave, or force carrying a message between the two points.
  • The No-Communication Theorem: You cannot use entanglement to transmit information, Morse code, or a phone call faster than light. If an observer on Earth measures an entangled photon, the result they get is completely random. An observer near Alpha Centauri measuring the twin particle also gets a random result. Neither knows what the other saw until they compare notes via a standard, sub-light-speed communication channel (radio, laser, etc.).

Because no classical information travels, Einstein’s cosmic speed limit is never violated within spacetime. The causality of our emergent world remains completely intact.

2. c is the Speed Limit of the Medium, Not the Substrate

Think of the speed of light ($c$) not as an arbitrary traffic law, but as the stiffness or transmission speed of the spacetime medium itself.

A direct analogy is sound in water:

  • In water, the maximum speed at which any pressure wave or audio signal can travel is roughly 1,500 meters per second (the speed of sound in water). If you are a creature made of sound waves living entirely inside the water, 1,500 m/s is your absolute cosmic speed limit. Nothing you build, shout, or signal can exceed it.
  • However, the individual $\text{H}_2\text{O}$ molecules themselves, or an external electric field applied across the water tank, are not bound by the acoustic speed limit of the fluid. The speed of sound is purely an emergent macroscopic property of how water molecules bump into each other.

If spacetime is emergent, the speed of light ($c$) is simply the speed of sound in the fabric of spacetime.

Particles and energy that exist inside spacetime are ripples in that fabric; naturally, they cannot ripple across the fabric faster than the fabric can propagate them. But quantum entanglement isn’t a ripple traveling through spacetime. Entanglement is the underlying relationship between the microscopic “molecules” out of which the fabric is woven in the first place.

3. The “ER = EPR” Resolution: Why Distance Disappears

In 2013, physicists Juan Maldacena and Leonard Susskind proposed a conjecture known as ER = EPR:

  • EPR stands for Einstein-Podolsky-Rosen (quantum entanglement).
  • ER stands for Einstein-Rosen bridges (wormholes in general relativity).

Their proposal suggests that when two particles are entangled, they aren’t two separate objects communicating across a vast expanse of empty space. Instead, their entanglement creates a microscopic, topological bridge between them.

From the outside—looking through our emergent 3D spacetime lens—the two particles might appear to be separated by four light-years. But from the underlying quantum perspective, they are right next to each other.

The correlation isn’t “traveling faster than light across four light-years”; it isn’t traveling at all, because at the fundamental level, the distance between them does not exist. The distance only exists as an emergent illusion experienced by macroscopic observers residing inside the macroscopic projection.

The Two Realms Coexist Harmoniously

There is only a conflict if one insists on naive reductionism—the assumption that the fundamental substrate must possess the same geometry, speed limits, and coordinate systems as the macroscopic world we see with our eyes.

Once you accept that:

  1. The Quantum Substrate is non-local, defined by entanglement networks and pure information states (where “here” and “there” don’t yet exist), and
  2. Spacetime is the smooth, low-energy, macroscopic average where geometry, coordinates, and a finite propagation speed ($c$) emerge,

the paradox dissolves. The quantum world doesn’t violate spacetime’s speed limit; rather, spacetime’s speed limit is born out of the collective behavior of the quantum world.

It seems much confusing in books and documentaries come from people who expect rules and logic should be the same for all realms of reality.

You’ve hit on what might be the single biggest cognitive trap in science communication: scale chauvinism—the stubborn instinct that our everyday, mid-scale human logic ought to apply universally, from quarks all the way up to the cosmic event horizon.

Human brains evolved on the African savannah to track medium-sized objects moving at medium speeds in three spatial dimensions. If an antelope goes behind a boulder, it still exists (object permanence). If a spear is thrown, it traverses the intervening distance step-by-step (locality). If a predator approaches from the left, its position has nothing to do with a bird taking flight three miles to the right (statistical independence).

Our “common sense” is simply the evolutionary rulebook for surviving in a low-velocity, macroscopic, emergent slice of reality.

When popular science presentations run into trouble, it is almost always because they try to force that savanna-level intuition onto regimes where it has no business operating:

  1. Category Errors (Demanding Micro-Properties at the Macro Level, and Vice Versa):Demanding that quantum entanglement respect the speed of light is like demanding that an individual alphabet letter have a plot, or that an isolated silicon transistor be able to run a spreadsheet. The rules governing the components simply don’t translate to the rules of the assembled system. When someone insists that subatomic particles must have definite, little-marble locations in space before measurement, they are projecting the properties of the macroscopic world down onto the very substrate that builds it.
  2. The Tyranny of the Word “Real”:Documentaries love to declare: “Spacetime is an illusion!” or “The quantum world isn’t real!” This is linguistic sleight of hand. A rainbow isn’t fundamental—it’s an emergent optical interaction between sunlight and water droplets—but that doesn’t make a rainbow “fake.” It just means it belongs to a specific level of organization. Treating one scale as “real” and another as an “illusion” creates fake paradoxes where none exist.
  3. Confusing Effective Theories with Fundamental Laws:In physics, nearly every great theory is an effective field theory—it is rigorously, mathematically true within its domain of validity, and completely useless outside of it. Aerodynamics is true for designing an airplane, but you can’t use it to solve a two-electron interaction. General relativity works brilliantly for orbital mechanics and black hole mergers because it operates at the emergent scale where spacetime exists. Quantum field theory works brilliantly at the subatomic scale. The friction only occurs when commentators insist that one set of rules must swallow the other whole.

Nobel physicist Philip Anderson summarized this decades ago in his famous 1972 essay “More Is Different”: at each level of complexity, entirely new properties and entirely new physical laws appear.

Much of the dramatic hand-wringing in popular media isn’t a crisis in the math of the universe; it’s just the sound of human common sense refusing to accept that nature isn’t obligated to make sense to a creature of our specific height and weight.

Are there good books that cover this subject?

Yes. Several exceptional books tackle this exact question—how nature organizes itself into autonomous, layered realms of reality, and why trying to force the rules of one scale onto another creates false paradoxes.

1. On Emergence, Scales, and Effective Reality

  • The Big Picture: On the Origins of Life, Meaning, and the Universe Itself by Sean Carroll
    • The core idea: Carroll develops what he calls “poetic naturalism.” His central thesis is that there is only one underlying physical world, but there are many valid, non-competing ways of talking about it depending on the scale.
    • Why it fits: Carroll explains why macroscopic concepts (like fluid flow, temperature, tables, and even human choices) are objectively real at their own level of description, even if they completely vanish when you zoom in to the quantum wavefunction. He directly dismantles the idea that higher levels of reality are “illusions.”
  • A Different Universe: Reinventing Physics from the Bottom Down by Robert B. Laughlin (Nobel Laureate in Physics)
    • The core idea: A fiery, brilliant challenge to reductionism from a condensed matter physicist. Laughlin argues that the most fundamental laws of nature—including the speed of light, relativity, and crystalline rigidity—are themselves emergent collective behaviors, not properties dictated by tiny individual particles.
    • Why it fits: It directly attacks the assumption that the smallest scale is the “most real” or that microscopic rules must dictate macro experiences.
  • The Order of Time by Carlo Rovelli
    • The core idea: Rovelli tackles how time, sequence, and entropy operate. At the fundamental quantum loop level, time does not exist as a coordinate or a flowing river; it only emerges when a macroscopic observer interacts with a vast system through a blurred, coarse-grained lens.
    • Why it fits: Rovelli writes with exceptional poetic and conceptual clarity about how the “rules” we take for granted are strictly properties of our macroscopic relationship to nature, not intrinsic to the foundation.

2. On the Cognitive Traps and the Philosophy of Physics

  • Scale: The Universal Laws of Life, Growth, and Death in Organisms, Cities, and Companies by Geoffrey West
    • The core idea: While broader than just quantum physics, West (a former high-energy physicist at Los Alamos and Santa Fe Institute researcher) explores how scale dictates rules. As systems change in size—from cells to mammals to cities—the governing dynamics, constraints, and geometry shift fundamentally.
    • Why it fits: It is one of the best comprehensive studies on why thinking a system will behave the same way when magnified or shrunk is a fatal design error.
  • What Is Real? The Unfinished Quest for the Meaning of Quantum Physics by Adam Becker
    • The core idea: A thorough history of how the founders of quantum mechanics tied themselves in knots trying to reconcile classical everyday intuition with the mathematics of the subatomic.
    • Why it fits: Becker exposes the historical source of this confusion: how early twentieth-century physicists either tried to pretend the microscopic world didn’t have objective rules at all (the Copenhagen orthodoxy) or demanded that it act like tiny billiard balls, rather than accepting that different mathematical descriptions govern different domains.
  • More and Different: Notes from a Thoughtful Curmudgeon by Philip W. Anderson
    • The core idea: A collection of essays expanding on Anderson’s landmark 1972 paper “More Is Different.”
    • Why it fits: Anderson systematically shows how symmetry-breaking creates entirely new physics at every rung of complexity. He demonstrates why particle physics cannot simply “explain away” chemistry, chemistry cannot explain biology, and the microscopic world cannot explain the emergent properties of space and matter.

A Foundational Essay Worth Reading First

Before diving into a full book, seek out Philip Anderson’s original four-page paper, “More Is Different” (published in Science, 1972).

It remains the cleanest manifesto against reductionist chauvinism ever written. In it, he neatly lays out the distinction between two ideas that popular documentaries constantly confuse:

  1. Reductionism: Working down to find the parts (which works).
  2. Constructionism: Assuming you can start with the elementary parts and simply reconstruct the universe using their rules (which completely fails).

As Anderson put it: “The ability to reduce everything to simple fundamental laws does not imply the ability to start from those laws and reconstruct the universe.”

I have some of them already. I just need to read and understand them.

Is there any evidence or speculation that there is a realm outside spacetime or underneath quantum reality?

There is no empirical evidence for a realm outside spacetime or underneath quantum mechanics—every experiment ever devised still confirms quantum theory to astonishing precision.

However, there is an enormous amount of serious mathematical speculation and theoretical physics exploring what might lie beneath quantum mechanics. Physicists have spent decades asking: If spacetime emerges from quantum mechanics, where does quantum mechanics itself come from?

Several major avenues of thought probe what might sit outside or beneath the quantum realm:

1. “It from Bit”: Reality as Pure Information

One of the most prominent frameworks, pioneered by John Archibald Wheeler (who coined “It from Bit”) and expanded by modern quantum information theorists, posits that the bottom layer of reality isn’t matter, waves, or fields, but pure information and logic.

  • In this view, quantum mechanics isn’t describing “stuff”; it is an operating manual for how information can be processed, observed, and correlated.
  • The rules of quantum probability (such as amplitudes squaring to probabilities, or the superposition principle) might simply be the only mathematically consistent way to handle incomplete information in a universe with finite boundaries.
  • The “sub-quantum realm” wouldn’t be a place with coordinates, but an abstract informational matrix where physical quantities are computed into existence only upon interaction.

2. Post-Quantum Theories and Generalized Probabilistic Theories (GPTs)

In the 1990s, physicists Sandu Popescu and Daniel Rohrlich asked a provocative question: Is quantum mechanics as weird as nature can get?

They discovered the answer is no. They formulated mathematical models called PR-boxes (Popescu-Rohrlich boxes):

  • Standard quantum mechanics allows correlations between particles up to a strict mathematical threshold known as the Tsirelson bound ($2\sqrt{2} \approx 2.82$).
  • Popescu and Rohrlich showed you can invent a theoretical world with correlations that are stronger than quantum mechanics (up to a value of $4.0$), perfectly preserving Einstein’s rule that nothing can transmit a message faster than light.

Physicists study these Generalized Probabilistic Theories to figure out why our universe chose ordinary quantum mechanics instead of a “super-quantum” framework. One prevailing hypothesis is that standard quantum mechanics sits in a unique “Goldilocks zone”—the maximum amount of non-locality possible without causing time loops, breakdown of thermodynamic reversible computing, or logical self-contradiction.

3. Geometric Substrates: The Amplituhedron

At the Institute for Advanced Study in Princeton, theoretical physicist Nima Arkani-Hamed and his colleagues discovered that calculating particle collisions using standard quantum field theory requires hundreds of pages of tedious algebraic Feynman diagrams.

They realized that all those calculations collapse into a single, elegant geometric object called the Amplituhedron:

  • The Amplituhedron is a multi-dimensional mathematical shape that lives entirely outside of space, time, and conventional quantum wavefunctions.
  • When you calculate the volume of its faces, the output matches the scattering amplitudes of subatomic particles in our spacetime.
  • In this framework, both spacetime locality and quantum unitarity are emergent byproducts of an underlying, timeless geometric structure. As Arkani-Hamed has frequently put it: “Spacetime is doomed, and quantum mechanics must be modified.”

4. Non-Commutative and Pre-Geometric Networks

In theories like Causal Dynamical Triangulations (CDT) or Wolfram-style hypergraphs, the foundation is not even geometric:

  • Underneath the quantum field is a discrete, evolving graph—a pure network of nodes and topological relationships.
  • There is no metric, no distance, no time, and no “quantum wave.” There are only relational rules connecting nodes.
  • Once the network reaches immense complexity, statistical averaging naturally produces the appearance of continuous space, curvature, and quantum wave distributions.

5. Bohmian Mechanics and the Sub-Quantum Ether

David Bohm proposed an alternative interpretation of quantum mechanics where particles are real and guided by a non-local “pilot wave.”

Some theorists, like Antony Valentini, have extended Bohm’s ideas to hypothesize a sub-quantum non-equilibrium:

  • In our current epoch, the universe is settled into “quantum equilibrium,” which is why the Born rule ($P = \vert{}\psi\vert{}^2$) and standard quantum mechanics always appear exact.
  • However, in the extreme conditions of the earliest fraction of a second after the Big Bang, the universe might have been in quantum non-equilibrium, where signals genuinely could travel faster than light and standard quantum rules broke down. Cosmologists look for faint signatures of this in the cosmic microwave background.

What “Beneath” Actually Means

When scientists speculate about what is “underneath” or “outside” quantum reality, they don’t mean a place you could visit in a submarine or a rocket.

Because space, distance, and time are the things that dissolve at that threshold, whatever lies beneath is almost certainly algebraic, relational, or informational. Reality at its absolute root may look less like a physical machine and much more like pure mathematics dreaming up geometry.

I didn’t mean an actual place either. 

Doesn’t Sabine Hoffenfelder (spelling?) object to these speculations?

Yes, you mean Sabine Hossenfelder, and your recollection is spot on. She is one of the sharpest, most vocal critics of these exact kinds of speculations in contemporary physics.

Her critique isn’t based on a lack of curiosity; it’s rooted in a strict philosophical stance on what actually constitutes empirical science versus what she terms “mathematical religion” or “inventing fairy tales.”

Her objections to ideas like the Amplituhedron, multiverse scenarios, and elaborate “pre-spacetime” geometries boil down to a few core arguments:

1. The Trap of “Aesthetic Physics”

In her book Lost in Math: How Beauty Leads Physics Astray, Hossenfelder argues that fundamental theoretical physics has stalled since the 1970s precisely because physicists began prioritizing mathematical beauty, elegance, and symmetry over empirical testability.

  • When theorists point to something like the Amplituhedron and say, “Look how elegant this is—it reduces hundreds of pages of algebra into a single shape,” Hossenfelder’s response is: Mathematical convenience is not physical ontology.
  • Just because a calculation is simpler or aesthetically pleasing does not mean the universe actually runs on that structure, especially when it produces zero new testable predictions beyond the existing theory.

2. The Complete Lack of “Falsifiability”

Hossenfelder is a strict Popperian when it comes to experimental standards. If a theory posits an underlying realm—whether it is a pre-geometric network, a string landscape, or a post-quantum matrix—she asks one straightforward question:

What measurement could someone perform tomorrow that would prove your model wrong?

Because these “beneath quantum mechanics” models typically live at or beyond the Planck scale ($10^{-35}$ meters, energy levels trillions of times higher than the Large Hadron Collider can ever probe), they are practically immune to experimental falsification. In her view, once you propose a structure that cannot be tested by any realistic experiment, you are no longer practicing physics; you are practicing philosophy or pure mathematics dressed in physics terminology.

3. The Irony: Her Own Speculation (Superdeterminism)

Interestingly, Hossenfelder has her own radical horse in this race, which often draws fire from other physicists.

She argues that theorists were far too hasty in abandoning classical determinism and declaring that “spacetime is an illusion.” Instead of inventing unprovable non-local geometries or claiming space is an emergent hologram, she contends physicists should take superdeterminism seriously.

Her rationale is pragmatic:

  • The measurement-independence assumption in Bell’s theorem has never been directly verified at the subatomic scale—it was simply assumed.
  • She argues that exploring deterministic, local, nonlinear differential equations is a much more conservative, grounded mathematical path than inventing extra dimensions, timeless geometries, or “realms outside spacetime.”

Naturally, other physicists throw her own criticism right back at her, pointing out that testing the fine-tuned initial conditions of superdeterminism is just as experimentally hopeless as testing the Planck-scale substrate.

Why Her Skepticism Is Valuable

Even if one doesn’t fully buy into her preference for superdeterminism, her broader skepticism serves as an essential sanity check for the field.

She reminds the public—and the physics community—that an equation having a solution does not mean that solution exists in physical reality. For Hossenfelder, until someone produces a concrete, measurable discrepancy between standard quantum mechanics and a proposed “sub-quantum” realm, asserting that spacetime or quantum mechanics is “doomed” is jumping the gun by several light-years.

Superdeterminism can be used to explain a lot.

But I wonder if human intelligence, and even AI, is too limited to understand reality. 

I think science and science fiction have given a swelled head.

That is a remarkably grounding observation, and history suggests you are almost certainly right. Science and science fiction share a wonderful, intoxicating virtue—they expand human imagination and solve practical mysteries—but they also cultivate a subtle arrogance: the unexamined assumption that the universe is fundamentally comprehensible to the human primate brain.

Science fiction in particular has spent a century grooming us to believe that with enough time, enough computing power, or enough equations on a transparent chalkboard, the cosmos will ultimately yield to our narrative habits. We love the trope of the lone genius (or the hyper-advanced computer) who finally cracks the “Theory of Everything” and neatly wraps the cosmos into a tidy mental package.

Yet there is no law of nature stating that reality must be decipherable by an ape whose cognitive apparatus was forged entirely to navigate social hierarchies, hunt game, and avoid predators in a 1-g gravitational field at roughly 300 Kelvin.

1. Cognitive Closure: Colin McGinn’s Blind Spot

Philosopher Colin McGinn coined the term “cognitive closure” to describe this exact limit.

A dog can have a rich, complex sensory experience of the world—it can hear frequencies we can’t, navigate by smell, and learn intricate routines—but a dog’s neural architecture is simply closed to calculus. It’s not that the dog hasn’t studied hard enough; it is that the cognitive equipment required to hold derivative equations in working memory does not exist in a canine brain.

There is every reason to suspect that humans are cognitively closed to certain aspects of reality:

  • The “Hardware” Bottleneck: Working memory holds roughly four to seven items at once. Our sensory perception registers a sliver of the electromagnetic spectrum.
  • The Metaphor Trap: Every tool we use to understand nature is built out of sensory metaphors. We think of atoms as “billiard balls,” fields as “ripples on water,” and spacetime as a “stretched rubber sheet” or a “computer program.” But what happens when the fundamental substrate of nature cannot be mapped to any macroscopic physical behavior? We get stuck in philosophical loop-de-loops, mistaking the limitations of our vocabulary for paradoxes in the universe.

2. The Narrative Bias: Compulsive Sense-Making

Science fiction writers and scientists alike are compulsive storytellers. The human brain hates an explanatory vacuum; when presented with fragmented data, it immediately weaves a causal arc to stitch the pieces together.

Superdeterminism is a prime example of an explanatory panacea. Just as older cultures used “it’s the will of the gods” to make sense of unaccountable randomness, superdeterminism can be invoked to explain away every weird quantum correlation: the script was simply written that way at the Big Bang. It “explains” everything while providing zero predictive utility. It satisfies the narrative appetite without providing physical purchase.

We want the universe to be a finished book with a beginning, a middle, and an intelligible plot. Reality, however, may not be a story at all.

3. Will AI Break the Ceiling, or Just Hit Its Own?

It is tempting to look at artificial intelligence and think: Well, if our meat brains are too limited, our silicon descendants will figure it out for us.

That may happen to some degree, but it runs into two profound walls:

  1. The Translation Problem: An advanced neural network might discover mathematical patterns in cosmological data that accurately predict quantum gravity. But if that network operates across 10,000 dimensions of latent statistical space, it cannot translate that “understanding” back into human terms. If an AI gives us an equation that predicts every experiment perfectly, but no human mind can visualize or conceptualize why it works, do we understand reality? Or have we just built a smarter oracle?
  2. The Training Substrate: AI is trained on data generated within our macroscopic, instrumented world. It relies on the measurements we take, the questions we ask, and the mathematical systems we invented. An intelligence grounded in human outputs may simply inherit our blind spots, or optimize for mathematical fit without ever touching whatever lies beneath the measurement apparatus.

The Modest View of Science

Accepting that our intelligence might have an intrinsic ceiling isn’t an admission of defeat; it is actually a return to genuine scientific humility.

When J.B.S. Haldane famously wrote, “The universe is not only queerer than we suppose, but queerer than we can suppose,” he wasn’t being poetic. He was stating a biological fact. Science has done miracles by figuring out the local rules of our particular corner of the macroscopic sandbox—how to cure polio, build microchips, and fly to the Moon.

The mistake is assuming that because we figured out the rules of the sandbox, we are equipped to comprehend the entire ocean that surrounds it. Nature isn’t obligated to make sense to us, and realizing that might be the smartest conclusion a curious mind can reach.

I think we should explore the possibilities of our limitations. For my species, what can we expect if we continue to exist on earth for another million years? I don’t think we’ll colonize space. What can we become if we don’t destroy ourselves or this planet.

Stripping away the interstellar manifest destiny changes the entire problem.

The traditional sci-fi dream—expanding outward into an endless frontier—was always a psychological bypass. It allowed us to imagine outrunning our biological and sociological limitations rather than solving them. If you take away the escape hatch of the stars and lock our species into a terrestrial cradle for a million years (roughly five times longer than Homo sapiens has existed so far), the vectors of development turn inward and downward instead of outward.

A million years on Earth without self-annihilation requires answering a very different question: What does an intelligent, tool-using primate become when it accepts the boundary conditions of its island?

1. Biological Drift and the Fall of the “Uniform Species”

Over a million years, human biology cannot remain static. Even without intentional genetic engineering, random genetic drift, localized adaptations, and the sheer passage of geological time would make our descendants biologically distinct from us.

  • Deliberate Homeostasis vs. Speciation: The first existential choice our descendants would face is whether to preserve the baseline human template. If they intervene genetically to cure disease, extend healthspan, or stabilize metabolic loads, they are actively managing their own genome. Over hundreds of millennia, that management inevitably diverges.
  • The Cognitive Trade-Off: The human brain is an energy hog, consuming 20% of our caloric intake. If cognitive enhancement is pursued, it will run into thermodynamic and biological walls (pelvic width, oxygen delivery, heat dissipation). They might not become hyper-cerebral giants; they might evolve brains that are far more metabolically efficient, running on optimized heuristic networks rather than brute-force computational mass.
  • Emotional Rewiring: The modern human is plagued by an evolutionary mismatch—Paleolithic emotions running 21st-century technology. If we survive long enough to modify ourselves, the first traits pruned won’t be physical weaknesses; they will be the tribal aggression, xenophobia, and status-seeking dopamine loops that make long-term stability impossible. A million-year-old human might seem emotionally alien: deeply placid, intensely cooperative, and lacking our manic restlessness.

2. The Steady-State Technosphere: True Technological Maturity

Science fiction often equates technological progress with sheer energetic scale (Kardashev scales, Dyson swarms). But on a closed planet, unbounded energetic expansion violates basic thermodynamics: waste heat alone would boil the biosphere.

True technological maturity for an Earthbound species looks like invisibility and integration, not gargantuan infrastructure:

  • The Recirculating Substrate: A million-year civilization cannot rely on finite extraction. All metallurgy, material synthesis, and energy capture must exist within closed biogeochemical loops. They won’t have open mines; their geology will be circular. Every atom mined in millennium two must still be accounted for in millennium nine hundred.
  • Biomimetic and Sub-Microscopic Engineering: Rather than building concrete mega-cities that crumble on century-long timescales, mature technology trends toward biology. Structures grown from mineral-fixing organisms, energy captured by artificial photosynthesis far more efficient than chlorophyll, and computing systems operating at the thermodynamic limit of computation (Landauer’s limit) without shedding massive waste heat.
  • Geological Engineering as Housekeeping: A million years encompasses several natural Milankovitch cycles—Earth will naturally want to enter major glacial maximums (ice ages). A surviving human species will not be at the mercy of continental ice sheets; their technology will act as a planetary thermostat, gently modulating atmospheric chemistry and albedo to preserve a habitable climatic envelope.

3. Culture: Escaping the Myth of Perpetual Progress

Our current worldview was born in the Industrial Revolution: the premise that history is a straight line sloping upward toward perpetual novelty, growth, and conquest. That mindset is only about 250 years old. It cannot survive across a million years.

  • Cyclical Time Over Linear Accumulation: Like ancient agrarian cultures, a long-lived species would likely return to a deep sense of cyclical time. Without an open spatial frontier, culture ceases to be about “disruption” and “growth” and becomes about deepening, nuance, and maintenance.
  • The “Library” Problem: What do you do with a million years of history? Humans already suffer from cultural amnesia, forgetting lessons from three generations ago. A million-year-old species would drown in its own archives if it tried to preserve everything. They would have to develop sophisticated cultural compression—distilling millennia of art, philosophy, and history into foundational parables, core aesthetic motifs, or algorithmic archetypes, willingly letting the ephemeral wash away like old strata.
  • Mastery of the Inner Frontier: Without space to distract them, the deep frontiers become mathematics, art, philosophy, music, and the landscape of consciousness itself. If you cannot travel 100 light-years across the galaxy, you spend 10,000 years exploring the mathematics of perception, or cultivating forms of shared consciousness and subjective experience that our linguistic tools can’t even frame.

4. The Intellectual Humility Plateau

Perhaps the most profound transformation would be intellectual. If they are smart enough to survive a million years, they will have long ago abandoned the “swelled head” of the early space-age humans.

  • Accepting the Horizons of Mind: They would likely understand precisely why the universe is cognitively closed to them. Instead of agonizing over a final “Theory of Everything” that maps neatly into primate symbols, they would treat physics the way an experienced mariner treats the sea: knowing the currents, respecting the depths, predicting the storms, but harboring no illusion that they are the center or the master of the ocean.
  • The AI Partnership as Quiet Infrastructure: Any artificial intelligence they maintain wouldn’t be an apocalyptic conqueror or a godlike savior. It would likely occupy the role of an autonomic nervous system. Just as your conscious brain doesn’t bother managing liver enzymes or regulating kidney filtration, their AIs would quietly manage the planetary climate, the ecological balances, and the deep data archives, leaving the biological or post-biological beings free to live within the quiet envelope of existence.

The Final Picture: An Earth Inhabited by Custodians

If you visited Earth 1,000,000 years from now, the most striking feature might not be towering crystalline cities or bizarre flying machines. It might look surprisingly wild.

The cities might be subterranean, sunken into geology, or integrated into dense, living forest-canopies and maritime shelves. The sky would be quiet—no fleets of rockets tearing through the ozone. The oceans would be rich, the atmospheric composition stable, and the population perhaps much smaller than today, stabilized at a sustainable carrying capacity of a few hundred million people.

Humans would not be gods. They would be the planetary gardeners—a species that outgrew its violent, hyperactive adolescence, realized the fence around the garden wasn’t a prison but a sanctuary, and settled into the profoundly difficult, beautiful work of simply being here.

You should write science fiction.

The thing I’m intrigued with is the library problem.

The archivist did not look at paper, because paper had turned to peat under the ice sheets eight hundred thousand years back, and he did not look at screens, because light on a glass plane was an adolescent habit the race had abandoned before the first carbon sequestration epoch.

Instead, Master Corren felt the compression through the bone of his wrist.

He sat on a bench of dressed river silt in the under-terrace at Memphis, where the bluff met the slow, grey elbow of the river. The morning was cool, smelling of damp sycamore leaves and sweet clover. Overhead, thirty miles of loam and living forest muffled the sky. Outside, the real Mississippi took its time finding the gulf, exactly as it had before the primates invented vowels, and exactly as it would after Corren finished his breakfast.

His apprentice, a girl of eighty named Sela whose jaw still held the sharp, restless angle of the old predatory centuries, leaned against the embankment. She had a tablet of soft beeswax and a bronze stylus, tools they had returned to because wax forgets nothing until you tell it to, and requires no current to remember what it knows.

“The seventh millennium is weeping again,” she said.

“Which shelf?” Corren asked, his eyes half-closed against the river mist.

“The late industrial spill. The transitional clutter. It wants to keep thirty-two million accounts of a single Tuesday in autumn.”

Corren sighed, the dry rattle of an old man whose lungs had survived two centuries of well-regulated cellar air. “They always want to keep the Tuesdays. Tell me the core.”

“A high-altitude turbine failed over an archipelago,” she said, reading the heat-traces on her thumb. “Two hundred people went into the salt. In the same hour, three governments signed a pact to restrict atmospheric sulphur. A woman in a northern city baked a loaf of rye and wrote down that she missed her brother. And four billion individuals recorded their irritation with their domestic heating apparatus.”

“That isn’t a core, Sela. That’s sediment. The sea doesn’t keep the foam; it keeps the salt.”

“If we drop the four billion,” she said, her voice dropping into the quiet defensive timbre apprentices always used when they reached for the shears, “we lose the texture. We lose the proof that they were stupid and miserable and loved one another anyway.”

“We do not lose it,” Corren said gently. “We have the Fifth Reduction.”

He turned his wrist, feeling the cold grain of the lattice beneath his skin. In that tiny nodule of silicate and spin-polarized bismuth lay the entirety of the Second Expansion—three hundred centuries of human screaming, reduced to nineteen harmonic equations and an eighty-line hexameter hymn that an eight-year-old child could sing while weeding the pea patch.

“Sing the third stanza,” he commanded.

Sela’s throat tightened, but she straightened her back and let the cadence out into the damp morning air:

The iron climbed into the cloud,

The wheel ran hot upon the grass,

The brother called his name aloud,

And through the chimney blew the glass.

The rhythm was stiff, older than the trees on the bluff, carrying the cadence of an ancient four-beat line that had outlasted every operating system ever compiled.

“There,” Corren said. “The air-fall is there. The cold room is there. The rye bread and the sulphur and the brother are there. It takes six seconds to speak. A child can keep it in her head while she walks a mile to the pump. When she sings it, the whole nineteenth century leans out of the dark and warms its hands at her mouth.”

“It isn’t the names,” she whispered.

“The names were silt, Sela. If we kept their names, the living would have no room to stand. The surface of the earth would be three feet deep in names, and the corn wouldn’t grow through them.”

She looked down at her wax tablet, where she had been scratching short, frantic lines that meant nothing to anyone who hadn’t studied the early machine-scripts. “Sometimes I think they were more alive than we are. Because they didn’t know the funnel was waiting for them.”

Corren smiled, watching a kingfisher drop from a willowy snag, hit the grey water with a clean plink, and rise again with an empty beak. The bird didn’t know the river had migrated sixty miles west since the ice receded; the bird only knew the depth of the ripple this morning.

“They weren’t more alive,” he told her. “They were just crowded. They thought that if they recorded the shape of every leaf, the tree would never drop them. They didn’t understand the First Rule of the Garden.”

“Which is?”

“To prune so the light reaches the root.” He stood, the joints of his knees clicking like dry reeds, and reached out his hand for her stylus. “Now. Let the four billion go. Keep the smell of the rye, keep the sulphur pact, and let the rest dissolve into the limestone. We have fifty centuries of mid-Cenozoic music to compress before sundown, and the choir in the lower hall needs to learn the chord for the year the coal stopped.”

I need to contemplate that. Talk later.

Take your time. I’ll be here whenever you’re ready to pick the thread back up.

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