closed-world assumption

formal-logic assumption that any statement that is not known to be true is false
Thing general Q1102454
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closed-world assumption

Summary

closed-world assumption ranks in the top 2% of general entities by monthly Wikipedia readership (140 views/month).[1]

Key Facts

  • closed-world assumption is a type of axiom[2].
  • closed-world assumption is part of mathematical logic[3].
  • closed-world assumption is the opposite of open-world assumption[4].
  • closed-world assumption's short name is recorded as {'lang': 'en', 'text': 'CWA'}[5].

Body

Definition and Type

closed-world assumption is a type of axiom[2]. It is the opposite of open-world assumption[4].

Use and Application

closed-world assumption is part of mathematical logic[3].

Why It Matters

closed-world assumption ranks in the top 2% of general entities by monthly Wikipedia readership (140 views/month).[1] It has Wikipedia articles in 9 language editions, a strong signal of global cultural recognition.[6] It is known by 6 alternative names across languages and contexts.[7]

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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). closed-world assumption. Retrieved April 10, 2026, from https://4ort.xyz/entity/closed-world-assumption
MLA “closed-world assumption.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/closed-world-assumption.
BibTeX @misc{4ortxyz_closed-world-assumption_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{closed-world assumption}}, year = {2026}, url = {https://4ort.xyz/entity/closed-world-assumption}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): closed-world assumption — https://4ort.xyz/entity/closed-world-assumption (retrieved 2026-04-10)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 12d ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 1MnX3G
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    + 3 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
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