Grelling–Nelson paradox

self-referential paradox: is the word “heterological” (defined as referring to a word that does not describe itself) heterological?
Thing paradox Q1028161
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Grelling–Nelson paradox

Summary

Grelling–Nelson paradox is a paradox[1]. It draws 549 Wikipedia views per month (paradox category, ranking #54 of 104).[2]

Key Facts

  • Grelling–Nelson paradox's instance of is recorded as paradox[3].
  • Kurt Grelling is named after Grelling–Nelson paradox[4].
  • Leonard Nelson is named after Grelling–Nelson paradox[5].
  • Grelling–Nelson paradox's said to be the same as is recorded as Russell's paradox[6].
  • Grelling–Nelson paradox's time of discovery or invention is recorded as +1908-00-00T00:00:00Z[7].
  • Grelling–Nelson paradox's Freebase ID is recorded as /m/01l94r[8].
  • Grelling–Nelson paradox's facet of is recorded as self-reference[9].
  • Grelling–Nelson paradox's MathWorld ID is recorded as GrellingsParadox[10].
  • Grelling–Nelson paradox's maintained by WikiProject is recorded as WikiProject Mathematics[11].
  • Grelling–Nelson paradox's ProofWiki ID is recorded as Grelling-Nelson_Paradox[12].

Why It Matters

Grelling–Nelson paradox draws 549 Wikipedia views per month (paradox category, ranking #54 of 104).[2] It has Wikipedia articles in 14 language editions, a strong signal of global cultural recognition.[13] It is known by 21 alternative names across languages and contexts.[14]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . Freebase Data Dumps. wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [13] . Wikidata sitelinks. wikidata.org.
  3. [14] . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Grelling–Nelson paradox. Retrieved May 3, 2026, from https://4ort.xyz/entity/grelling-nelson-paradox
MLA “Grelling–Nelson paradox.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/grelling-nelson-paradox.
BibTeX @misc{4ortxyz_grelling-nelson-paradox_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Grelling–Nelson paradox}}, year = {2026}, url = {https://4ort.xyz/entity/grelling-nelson-paradox}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Grelling–Nelson paradox — https://4ort.xyz/entity/grelling-nelson-paradox (retrieved 2026-05-03)

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