# Surprise: Free Will Needs Quantum Physics to Fail, Physicists Show Source: https://www.youtube.com/watch?v=VspNpBTSdc4 Recap page: https://rapidrecap.app/video/VspNpBTSdc4 Generated: 2025-12-20T16:35:08.496+00:00 --- ## Quick Overview Physicists Emily C. Adlam, Kelvin J. McQueen, and Mordecai Waegell argue that agency—the ability to make internally driven decisions—cannot be a purely quantum phenomenon because quantum mechanics conflicts with the necessary conditions for agency, specifically the requirement for an agent to create and use a world-model, which involves copying information, an action forbidden by the No-Cloning Theorem in quantum physics. **Key Points:** - Agency, defined as the ability to make internally driven decisions, requires an agent to create and use a world-model to evaluate alternative actions. - The requirement to create a world-model conflicts with the No-Cloning Theorem of quantum physics, which forbids creating an identical copy of an unknown quantum state without destroying the original. - The paper concludes that agency requires significant classical resources, suggesting that the brain cannot operate purely on quantum mechanics. - The authors rate the claim that consciousness is linked to quantum physics as high on the "Bullshit Meter" (6 out of 10). - The paper, dated October 16, 2025, is titled "Agency cannot be a purely quantum phenomenon" and is not peer-reviewed. ![Screenshot at 00:25: The video splits the screen to contrast Quantum Physics \(represented by an abstract colorful wave pattern\) with Classical Physics \(represented by a basketball bouncing in grass\), illustrating the two domains of physics being compared in relation to consciousness claims.](https://ss.rapidrecap.app/screens/VspNpBTSdc4/00-00-25.jpg) **Context:** The video discusses a recent pre-print paper from Emily C. Adlam, Kelvin J. McQueen, and Mordecai Waegell, which investigates the physical requirements for 'agency'—the ability to make choices based on internal models of the world—and specifically challenges the idea that consciousness or agency can arise purely from quantum physical processes in the brain. The discussion centers on the inherent properties of quantum mechanics, such as indefiniteness and uncertainty, contrasting them with the requirements for a coherent, decision-making system. ## Detailed Analysis The video reviews a paper arguing against the hypothesis that human consciousness or agency stems from quantum physics. The speaker, Sabine Hossenfelder, explains that while some physicists like Roger Penrose suggest a quantum link, the new paper argues that agency requires three minimal conditions: creating a world-model, using it to evaluate alternative actions, and reliably performing the optimal action. The core argument hinges on the second condition: world-model construction requires copying information, which is impossible for quantum states due to the No-Cloning Theorem. The paper demonstrates that approximate cloning strategies do not maintain sufficient fidelity for agency to be viable in a purely quantum system. Consequently, agency requires significant classical resources, implying that quantum effects do not explain high-level brain functions like decision-making or free will. The speaker humorously rates the idea that consciousness is purely quantum as a 6 out of 10 on her 'Bullshit Meter' and promotes the educational platform Brilliant as a way to learn complex topics intuitively. ### Quantum Consciousness Critique - Some physicists link consciousness to quantum physics, but the reviewed paper argues agency requires a world-model - World-model creation requires copying information - Quantum mechanics forbids exact copying via the No-Cloning Theorem. ### Implications for Agency - Purely quantum systems cannot satisfy the requirements for agency due to the No-Cloning Theorem - Agency necessitates significant classical resources - Quantum mechanics does not eliminate free will, but it prevents agency from being purely quantum. ### Video Host Commentary & Rating - Sabine Hossenfelder rates the quantum consciousness claim as a 6/10 on her 'Bullshit Meter' - She suggests the paper offers a genuinely new argument against quantum consciousness. ### Brilliant Promotion - The video concludes with an advertisement for Brilliant, highlighting its interactive courses in Math Foundations, Data Analysis, Programming & CS, and Science, offering viewers 20% off an annual subscription. ![Screenshot at 00:05: Text overlay "Quantum Link to Consciousness?" appears next to an abstract visualization of a human head shape made of swirling lines.](https://ss.rapidrecap.app/screens/VspNpBTSdc4/00-00-05.jpg) ![Screenshot at 00:16: Text overlay "NOT Quantum" appears next to an image of neurons firing, alongside a thinking face emoji, contradicting the initial premise.](https://ss.rapidrecap.app/screens/VspNpBTSdc4/00-00-16.jpg) ![Screenshot at 00:30: Side-by-side comparison graphic illustrating Quantum Physics \(abstract wave pattern\) versus Classical Physics \(basketball in grass\), labeling the two domains.](https://ss.rapidrecap.app/screens/VspNpBTSdc4/00-00-30.jpg) ![Screenshot at 00:48: A list appears on screen showing the three minimal conditions for agency according to the paper: 1. Indefinite, 2. Uncertainty, 3. Indeterministic.](https://ss.rapidrecap.app/screens/VspNpBTSdc4/00-00-48.jpg) ![Screenshot at 01:53: A large red 'X' is drawn over the side-by-side comparison of Quantum Physics and Classical Physics, visually rejecting the notion that they are separate regimes for macroscopic objects.](https://ss.rapidrecap.app/screens/VspNpBTSdc4/00-01-53.jpg)