Frauchiger–Renner paradox
E443149
The Frauchiger–Renner paradox is a thought experiment in quantum foundations that extends Wigner’s friend scenario to argue that standard quantum theory cannot consistently describe its own use by multiple observers.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Frauchiger–Renner paradox canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4461466 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Frauchiger–Renner paradox Context triple: [Wigner’s friend thought experiment, relatedTo, Frauchiger–Renner paradox]
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A.
Einstein–Podolsky–Rosen paradox
The Einstein–Podolsky–Rosen paradox is a thought experiment that challenges the completeness of quantum mechanics by highlighting the strange, nonlocal correlations predicted for entangled particles.
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B.
Wigner’s friend thought experiment
Wigner’s friend thought experiment is a foundational quantum mechanics scenario that explores the role of observers and consciousness in measurement by considering how different observers can assign conflicting quantum states to the same system.
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C.
Einstein’s photon box
Einstein’s photon box is a famous thought experiment proposed by Albert Einstein to challenge the foundations of quantum mechanics by questioning the limits of energy-time uncertainty.
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D.
Quantum Fiber
Quantum Fiber is a high-speed fiber-optic internet service brand operated by Lumen Technologies, offering residential and business broadband connectivity.
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E.
Born rule in quantum mechanics
The Born rule in quantum mechanics is the fundamental postulate that connects a system’s wavefunction to experimentally observed probabilities by stating that measurement outcomes occur with probabilities given by the squared magnitude of the wavefunction’s amplitudes.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Frauchiger–Renner paradox Target entity description: The Frauchiger–Renner paradox is a thought experiment in quantum foundations that extends Wigner’s friend scenario to argue that standard quantum theory cannot consistently describe its own use by multiple observers.
-
A.
Einstein–Podolsky–Rosen paradox
The Einstein–Podolsky–Rosen paradox is a thought experiment that challenges the completeness of quantum mechanics by highlighting the strange, nonlocal correlations predicted for entangled particles.
-
B.
Wigner’s friend thought experiment
Wigner’s friend thought experiment is a foundational quantum mechanics scenario that explores the role of observers and consciousness in measurement by considering how different observers can assign conflicting quantum states to the same system.
-
C.
Einstein’s photon box
Einstein’s photon box is a famous thought experiment proposed by Albert Einstein to challenge the foundations of quantum mechanics by questioning the limits of energy-time uncertainty.
-
D.
Quantum Fiber
Quantum Fiber is a high-speed fiber-optic internet service brand operated by Lumen Technologies, offering residential and business broadband connectivity.
-
E.
Born rule in quantum mechanics
The Born rule in quantum mechanics is the fundamental postulate that connects a system’s wavefunction to experimentally observed probabilities by stating that measurement outcomes occur with probabilities given by the squared magnitude of the wavefunction’s amplitudes.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
paradox in quantum foundations
ⓘ
quantum thought experiment ⓘ |
| aimsToShow |
single-world interpretations of quantum mechanics are inconsistent under certain assumptions
ⓘ
standard quantum theory cannot consistently describe its own use ⓘ |
| assumes |
agents can use quantum theory to reason about other agents
ⓘ
self-consistency of reasoning among agents ⓘ single-world outcomes ⓘ universal validity of quantum theory ⓘ |
| basedOn | Wigner’s friend thought experiment ⓘ |
| challenges |
consistency of standard quantum mechanics with single-world assumptions
ⓘ
interpretations that treat quantum theory as universally valid without modification ⓘ |
| conclusion | different agents using quantum theory can arrive at mutually inconsistent statements ⓘ |
| controversial | true ⓘ |
| field |
philosophy of physics
ⓘ
quantum foundations ⓘ quantum mechanics ⓘ |
| hasAuthor |
Daniela Frauchiger
ⓘ
Renato Renner ⓘ |
| hasInterpretations | different resolutions depending on interpretation of quantum mechanics ⓘ |
| involves |
Wigner-type super-observers
ⓘ
entangled quantum systems ⓘ logical contradictions between agents’ predictions ⓘ multiple observers ⓘ nested observers ⓘ quantum measurements ⓘ reasoning about measurement outcomes ⓘ |
| motivates |
analysis of consistency conditions in quantum reasoning
ⓘ
debates about the meaning of quantum states ⓘ revisions of assumptions about observers in quantum theory ⓘ |
| namedAfter |
Daniela Frauchiger
ⓘ
Renato Renner ⓘ |
| publicationYear | 2018 ⓘ |
| publishedIn | Nature Communications ⓘ |
| relatedTo |
Wigner’s friend paradox
ⓘ
linked to:
Wigner’s friend thought experiment
logical no-go theorems in quantum foundations ⓘ self-reference in physical theories ⓘ |
| relevantTo |
Bohmian mechanics
ⓘ
linked to:
pilot-wave theory
Copenhagen interpretation ⓘ Many-worlds interpretation of quantum mechanics ⓘ QBism ⓘ objective collapse theories ⓘ relational quantum mechanics ⓘ |
| title | Quantum theory cannot consistently describe the use of itself ⓘ |
| usesConcept |
Born rule
ⓘ
linked to:
Born rule in quantum mechanics
entanglement ⓘ measurement problem ⓘ quantum superposition ⓘ unitary evolution ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Frauchiger–Renner paradox Description of subject: The Frauchiger–Renner paradox is a thought experiment in quantum foundations that extends Wigner’s friend scenario to argue that standard quantum theory cannot consistently describe its own use by multiple observers.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.