The Nobel Laureate Who (Also) Says Quantum Theory Is "Totally Wrong"

Episode Overview

• This episode features Nobel laureate Gerard 't Hooft discussing a radical reinterpretation of physics: that the universe is fundamentally deterministic, operating as a discrete, cosmic cellular automaton.
• The narrative challenges the mainstream probabilistic view of quantum mechanics, proposing instead that probability and superposition are merely epistemic tools we use to manage our lack of infinite computational precision.
• The discussion explores how resolving modern physical paradoxes—like Bell's inequality and the black hole information loss paradox—requires embracing superdeterminism and abandoning the concept of continuous real numbers.
• This content is highly relevant to physicists, philosophers, and science enthusiasts interested in foundational questions about quantum mechanics, determinism, and the mathematical nature of reality.

Key Concepts

• Deterministic vs. Probabilistic Reality (The Cellular Automaton Interpretation): The universe is modeled as a cosmic cellular automaton operating under strict, deterministic local update rules. Quantum mechanics is not an ontological description of a fundamentally random reality, but rather a statistical, epistemic tool. We use probabilities because we lack the infinite precision needed to track every sub-Planckian state; probability is a measure of human ignorance, not a law of nature.
• The Problem with Real Numbers and Continuous Mathematics: Standard physics relies on continuous calculus and real numbers, which require infinite decimal places—and thus infinite information—to define a single point in space or time. In a finite physical model, this is impossible. Real numbers do not exist at the fundamental scale; nature instead operates on discrete integers and quantized time steps, functioning like a digital computer.
• Superdeterminism as a Loophole to Bell's Theorem: Bell's Theorem suggests that local determinism is incompatible with quantum measurements, but it relies on the assumption of statistical independence (the "free will" of the experimenter to choose measurement settings). Superdeterminism posits that the experimenter's choices and the particles' states are causally linked by their common past at the Big Bang, eliminating the need for "spooky action at a distance" without requiring non-local signaling.
• Sociological Bias Toward Complexity in Physics: The physics community often exhibits a cognitive bias that favors highly complex, untestable theories (such as the Many-Worlds interpretation or multi-dimensional string theory) over simpler, deterministic ones. Complex proposals are paradoxically easier to accept because they are difficult to directly falsify, whereas simple deterministic models face immediate resistance and technical objections.
• Discrete Boundary Solutions to Black Hole Paradoxes: Applying a discrete framework to black holes resolves the information loss paradox. By treating the black hole horizon as a deterministic scattering matrix (mirror), incoming states map directly to outgoing states, preserving unitarity and information without relying on wormholes or bulk-boundary holographic magic.

Quotes

• At 0:01:23 - "If you come with a very simple theory or idea, then people have all sorts of complaints and objections. But when you come with something that clearly cannot be corrected directly, and sounds like a long-distance approach, then that gets much more support." - Gerard 't Hooft explains the sociological bias in academia toward complex, untestable theories over simple, deterministic ones.
• At 0:03:10 - "If you suggest maybe quantum mechanics is just a deterministic theory in disguise... people come with lots of objections. But when you propose to someone that there are many universes at the same time... you very rarely hear objections against that." - Highlighting the paradox where the Many-Worlds interpretation is accepted more readily than a straightforward deterministic model.
• At 0:05:42 - "The real world isn't probabilistic. It's only probabilistic if you don't have all information." - Summarizing the core philosophy of 't Hooft's cellular automaton interpretation: probability is a consequence of incomplete data, not an inherent property of the universe.
• At 0:06:39 - "I think those [quantum] predictions are totally wrong, but they are closer to the truth than anything else you can predict." - Explaining that while quantum mechanics is an incredibly successful statistical tool, it fails as a fundamental description of individual events.
• At 0:08:00 - "Eventually, what I want is to have a theory that gives this kind of predictions: if you knew all the initial data with infinite accuracy, with mathematical precision, then the theory gives you an explicit result." - Defining the ultimate goal of a complete physical theory: absolute predictability based on exact initial states.
• At 0:31:18 - "The theory gives completely wrong predictions as to say where exactly will everything come... Quantum mechanics can only give statistical predictions, and I think those predictions are totally wrong, but they are closer to the truth than anything else you can predict." - Highlighting that while quantum mechanics is highly successful as a statistical tool, it fails to describe the actual, precise paths of individual particles.
• At 0:34:08 - "What is wrong is that the theory doesn't ever talk about genuinely existing situations, which have a probability of one of happening, and probability zero of not happening..." - Addressing why standard quantum theory is incomplete; it cannot describe single, definite events with absolute certainty.
• At 0:36:09 - "I don't believe in the existence of real numbers in physics... because a real number is only specified if you specify an infinite number of decimal places. That’s very hard to realize in a finite model." - Explaining the philosophical and practical problems of using continuous real numbers in physical theories, advocating instead for a discrete, integer-based reality.
• At 0:38:20 - "We have Einstein's equations. We have curvature of space and time. So any theory that uses that will have to have such sheets. And how to make those discretized is very difficult." - Highlighting the challenge of reconciling a discrete cellular automata model with the continuous, smooth geometry of Einstein's General Relativity.
• At 0:41:07 - "I think John Bell made a very elementary error... He assumed that the decisions made by Bob and Alice to measure something is independent of what happened in the past. And my reaction was... that cannot be true." - Explaining how the assumption of "free will" or statistical independence in Bell's Theorem is violated in a superdeterministic universe, where the experimenters' choices and the particles' states share a common past cause.
• At 0:54:15 - "Quantum mechanics only gives statistical answers to any questions as to what will happen... But the real world isn't probabilistic. It's only probabilistic if you don't have all the information." - Explaining the foundational premise of 't Hooft's philosophy: probability is a human limitation, not a fundamental property of nature.
• At 0:56:51 - "I think those predictions [of quantum mechanics] are totally wrong, but they are closer to the truth than anything else you can predict." - Explaining why 't Hooft respects the utility of quantum mechanics while rejecting its ontological validity as a fundamental description of reality.
• At 1:00:27 - "There's never a superposition between a dead cat and a live cat... That's only because our understanding today of the true laws of nature is too uncertain." - Demystifying the Schrödinger's Cat paradox, asserting that the cat is always either strictly dead or alive; superposition is merely a tool used to describe our ignorance of the system's state.
• At 1:03:34 - "I don't believe in the existence of real numbers in physics... Every single real number is only specified if you have specified an infinite number of decimal places. That is very hard to realize in a finite model like the cellular automaton." - Explaining his departure from continuous mathematics. If nature is fundamentally finite, it must be discrete, operating purely on integer states.
• At 1:06:50 - "Everything we do is also controlled by the same theory. So our decisions to measure this or to measure that also depend on what happened in the past." - Outlines the core mechanism of superdeterminism, explaining how the experimenter's "choices" are causally linked to the system under observation.

Takeaways

• Treat quantum wavefunctions as epistemic tools representing our state of knowledge (psi-epistemic) rather than ontic representations of physical reality (psi-ontic).
• Design and evaluate physical models using integer-based discrete mathematics and quantized steps rather than relying on real numbers that require infinite decimal precision.
• Re-examine scientific assumptions of "statistical independence" and "free will" in experiments to see if hidden, shared past causes (superdeterminism) explain correlated outcomes.
• Guard against academic bias toward untestable complexity by actively seeking and defending simpler, deterministic explanations even when they face immediate technical objections.
• Use the "Grandfather's Clock" analogy to understand how continuous-looking macroscopic behavior can emerge naturally from discrete, step-wise underlying mechanisms.
• Approach boundary conditions (like black hole horizons) using deterministic scattering matrices to preserve information, rather than assuming information is fundamentally lost.
• Leverage statistical frameworks as highly effective computational shortcuts while keeping in mind that they may be placeholders for deeper, deterministic rules.
• Look to future computational systems, AI, or deeper mathematical insights into fundamental constants (such as the fine-structure constant $1/137$) to derive discrete local rules.
• Ensure that any foundational cellular automaton model used to describe physical systems features strictly time-reversible local rules to preserve information in both directions.