Sphaerus of Borysthenes
E278296
Sphaerus of Borysthenes was an ancient Greek Stoic philosopher, originally a student of Zeno and later influential at the court of King Cleomenes III of Sparta.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sphaerus of Borysthenes canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2558346 — 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: Sphaerus of Borysthenes Context triple: [Cleanthes of Assos, student, Sphaerus of Borysthenes]
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A.
Dorotheus
Dorotheus is a relatively obscure historical or religious figure known primarily through their association with Theophilus.
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B.
Dorotheus
Dorotheus was a 6th-century Byzantine jurist who helped systematize and codify Roman law under Emperor Justinian I.
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C.
Philoxenus of Mabbug
Philoxenus of Mabbug was a prominent 5th–6th century Syriac Christian bishop and theologian known for his influential Miaphysite writings and biblical commentaries.
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D.
Heraclides Ponticus
Heraclides Ponticus was a 4th-century BCE Greek philosopher and astronomer known for proposing that the Earth rotates on its axis and for early heliocentric ideas.
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E.
Apollodorus of Damascus
Apollodorus of Damascus was a prominent 2nd-century Roman architect and engineer known for designing major imperial projects under Emperor Trajan, including monumental buildings and infrastructure across the Roman Empire.
- 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: Sphaerus of Borysthenes Target entity description: Sphaerus of Borysthenes was an ancient Greek Stoic philosopher, originally a student of Zeno and later influential at the court of King Cleomenes III of Sparta.
-
A.
Dorotheus
Dorotheus is a relatively obscure historical or religious figure known primarily through their association with Theophilus.
-
B.
Dorotheus
Dorotheus was a 6th-century Byzantine jurist who helped systematize and codify Roman law under Emperor Justinian I.
-
C.
Philoxenus of Mabbug
Philoxenus of Mabbug was a prominent 5th–6th century Syriac Christian bishop and theologian known for his influential Miaphysite writings and biblical commentaries.
-
D.
Heraclides Ponticus
Heraclides Ponticus was a 4th-century BCE Greek philosopher and astronomer known for proposing that the Earth rotates on its axis and for early heliocentric ideas.
-
E.
Apollodorus of Damascus
Apollodorus of Damascus was a prominent 2nd-century Roman architect and engineer known for designing major imperial projects under Emperor Trajan, including monumental buildings and infrastructure across the Roman Empire.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Hellenistic philosopher
ⓘ
Stoic philosopher ⓘ ancient Greek philosopher ⓘ |
| activeIn | 3rd century BCE ⓘ |
| associatedWith |
Borysthenes
ⓘ
Cleomenes III of Sparta ⓘ Sparta ⓘ Zeno of Citium ⓘ |
| birthPlace | Borysthenes ⓘ |
| citizenship | Greek world ⓘ |
| contemporaryOf |
Chrysippus of Soli
ⓘ
Cleanthes of Assos ⓘ
surface form:
Cleanthes
Cleomenes III of Sparta ⓘ |
| era | Hellenistic period ⓘ |
| gender | male ⓘ |
| influenced |
Cleomenes III of Sparta
ⓘ
Spartan political reforms under Cleomenes III ⓘ |
| knownFor |
discussion of cognitive impressions
ⓘ
influence on Cleomenes III’s reforms ⓘ strict Stoic views on certainty and assent ⓘ |
| language | Ancient Greek ⓘ |
| mentionedIn |
Diogenes Laertius, Lives and Opinions of Eminent Philosophers
ⓘ
Plutarch’s Parallel Lives ⓘ
surface form:
Plutarch, Life of Cleomenes
|
| name | Sphaerus of Borysthenes self-link ⓘ |
| notableAnecdote | story of being deceived by wax pomegranates used to test his views on assent ⓘ |
| occupation |
philosopher
ⓘ
royal adviser ⓘ |
| philosophicalDiscipline |
epistemology
ⓘ
ethics ⓘ logic ⓘ political philosophy ⓘ |
| philosophicalPosition |
defense of Stoic doctrine of kataleptic impressions
ⓘ
emphasis on withholding assent in cases of uncertainty ⓘ |
| philosophicalSchool | Stoicism ⓘ |
| regionOfActivity |
Athens
ⓘ
Sparta ⓘ |
| religion | ancient Greek religion ⓘ |
| servedAtCourtOf | Cleomenes III of Sparta ⓘ |
| statusOfWorks | survives only in fragments and testimonia ⓘ |
| studentOf |
Cleanthes of Assos
ⓘ
surface form:
Cleanthes
Zeno of Citium ⓘ |
| taught |
Stoic ethics
ⓘ
Stoic logic ⓘ Stoic physics ⓘ |
| tradition | Stoic tradition ⓘ |
| wroteAbout |
Stoic views on knowledge and certainty
ⓘ
practical ethics for rulers ⓘ |
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: Sphaerus of Borysthenes Description of subject: Sphaerus of Borysthenes was an ancient Greek Stoic philosopher, originally a student of Zeno and later influential at the court of King Cleomenes III of Sparta.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.