Hooded man paradox
E368055
The Hooded man paradox is an ancient logical puzzle about knowledge and identity that questions whether recognizing someone in one context guarantees knowing them in another, often attributed to the philosopher Eubulides of Miletus.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Hooded man paradox canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T3550531 — 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: Hooded man paradox Context triple: [Eubulides of Miletus, knownFor, Hooded man paradox]
-
A.
Paradox
Paradox is a relational database management system and development environment originally popular on DOS and Windows, known for its ease of use and integration with Borland’s programming tools.
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B.
Curry paradox
Curry paradox is a self-referential logical paradox that arises in certain formal systems without using negation, showing how naive reasoning about implication and self-reference can lead to triviality.
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C.
On Contradiction
"On Contradiction" is a 1937 philosophical essay by Mao Zedong that systematically applies and develops Marxist dialectical materialism to analyze the nature and role of contradictions in social and historical processes.
-
D.
Barber paradox
The Barber paradox is a self-referential logical puzzle about a barber who shaves all and only those who do not shave themselves, illustrating a contradiction similar to Russell’s paradox.
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E.
Man in the Box
"Man in the Box" is a heavy, grunge-era song by Alice in Chains known for its distinctive vocal effects, dark lyrics, and status as one of the band's signature tracks.
- 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: Hooded man paradox Target entity description: The Hooded man paradox is an ancient logical puzzle about knowledge and identity that questions whether recognizing someone in one context guarantees knowing them in another, often attributed to the philosopher Eubulides of Miletus.
-
A.
Paradox
Paradox is a relational database management system and development environment originally popular on DOS and Windows, known for its ease of use and integration with Borland’s programming tools.
-
B.
Curry paradox
Curry paradox is a self-referential logical paradox that arises in certain formal systems without using negation, showing how naive reasoning about implication and self-reference can lead to triviality.
-
C.
On Contradiction
"On Contradiction" is a 1937 philosophical essay by Mao Zedong that systematically applies and develops Marxist dialectical materialism to analyze the nature and role of contradictions in social and historical processes.
-
D.
Barber paradox
The Barber paradox is a self-referential logical puzzle about a barber who shaves all and only those who do not shave themselves, illustrating a contradiction similar to Russell’s paradox.
-
E.
Man in the Box
"Man in the Box" is a heavy, grunge-era song by Alice in Chains known for its distinctive vocal effects, dark lyrics, and status as one of the band's signature tracks.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
epistemic paradox
ⓘ
logical paradox ⓘ philosophical puzzle ⓘ thought experiment ⓘ |
| challengesPrinciple |
closure of knowledge under known equivalence
ⓘ
substitutivity of identicals in epistemic contexts ⓘ |
| hasAlternativeName |
Hooded man argument
ⓘ
Hooded man puzzle ⓘ Masked man paradox ⓘ |
| hasAuthor | Eubulides of Miletus ⓘ |
| hasEducationalUse |
illustrating problems with substitutivity in knowledge attributions
ⓘ
teaching intensional versus extensional contexts ⓘ |
| hasExampleScenario | a person knows their brother but does not know that the hooded man is their brother ⓘ |
| hasKeyQuestion |
whether identity statements can be substituted in knowledge contexts
ⓘ
whether recognizing someone in one context guarantees knowing them in another ⓘ |
| hasLogicalForm | argument about knowledge of persons under different descriptions ⓘ |
| hasMainTheme |
identity of indiscernibles
ⓘ
surface form:
Leibniz's law
cognitive significance ⓘ contextual knowledge ⓘ epistemic logic ⓘ identity ⓘ intensional contexts ⓘ knowledge ⓘ logical omniscience ⓘ philosophy of language ⓘ philosophy of mind ⓘ recognition ⓘ reference ⓘ self-knowledge ⓘ substitution of identicals ⓘ |
| hasOriginPlace |
Greek Antiquity
ⓘ
surface form:
Ancient Greece
|
| hasStatus | classic example in epistemic logic ⓘ |
| hasTimePeriod | 4th century BCE ⓘ |
| isAttributedTo | Eubulides of Miletus ⓘ |
| isDiscussedIn |
epistemology
ⓘ
logic ⓘ philosophy of language literature ⓘ |
| isPartOf |
Megarian school
ⓘ
surface form:
Megarian school tradition
|
| isRelatedTo |
Fregean semantics
ⓘ
surface form:
Frege's puzzle
Kripke semantics ⓘ
surface form:
Kripkean semantics
epistemic opacity ⓘ intensionality ⓘ knowledge ascription ⓘ liar paradox ⓘ Masked man paradox ⓘ
surface form:
masked man fallacy
modal logic ⓘ Sorites paradox ⓘ
surface form:
sorites paradox
substitution failure ⓘ |
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: Hooded man paradox Description of subject: The Hooded man paradox is an ancient logical puzzle about knowledge and identity that questions whether recognizing someone in one context guarantees knowing them in another, often attributed to the philosopher Eubulides of Miletus.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.