Ugly duckling theorem

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Ugly duckling theorem

Quality:

Ugly duckling theorem - an argument showing that classification is not really possible without some sort of bias. Article “Ugly duckling theorem” in Simple English Wikipedia has 8.7 points for quality (as of July 1, 2025). The article contains 1 references and 2 sections.

This article has the best quality in English Wikipedia. Also, this article is the most popular in that (Simple English) language version.

Since the creation of article “Ugly duckling theorem”, its content was written by 3 registered users of Simple English Wikipedia and edited by 98 registered Wikipedia users in all languages.

The article is cited 1 times in Simple English Wikipedia and cited 26 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Simple English): #1312 in May 2024
  • Global: #119821 in April 2021

The highest popularity rank from 2008:

  • Local (Simple English): #27012 in May 2025
  • Global: #565352 in May 2025

There are 6 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
Ugly duckling theorem
24.9048
2Polish (pl)
Twierdzenie o Brzydkim Kaczątku
16.4777
3Persian (fa)
قضیه جوجه‌اردک زشت
10.5555
4German (de)
Ugly-Duckling-Theorem
10.1509
5Simple English (simple)
Ugly duckling theorem
8.7286
6Italian (it)
Teorema del brutto anatroccolo
6.6886
More...

The following table shows the most popular language versions of the article.

Most popular in all the time

The most popular language versions of the article "Ugly duckling theorem" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Ugly duckling theorem
148 278
2Italian (it)
Teorema del brutto anatroccolo
18 438
3German (de)
Ugly-Duckling-Theorem
12 529
4Polish (pl)
Twierdzenie o Brzydkim Kaczątku
1 903
5Simple English (simple)
Ugly duckling theorem
1 103
6Persian (fa)
قضیه جوجه‌اردک زشت
406
More...

The following table shows the language versions of the article with the highest popularity in the last month.

Most popular in June 2025

The most popular language versions of the article "Ugly duckling theorem" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Ugly duckling theorem
1 938
2Simple English (simple)
Ugly duckling theorem
314
3Polish (pl)
Twierdzenie o Brzydkim Kaczątku
42
4German (de)
Ugly-Duckling-Theorem
15
5Italian (it)
Teorema del brutto anatroccolo
12
6Persian (fa)
قضیه جوجه‌اردک زشت
8
More...

The following table shows the language versions of the article with the highest Authors’ Interest.

The highest AI

Language versions of the article "Ugly duckling theorem" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Ugly duckling theorem
52
2Italian (it)
Teorema del brutto anatroccolo
21
3German (de)
Ugly-Duckling-Theorem
16
4Persian (fa)
قضیه جوجه‌اردک زشت
3
5Polish (pl)
Twierdzenie o Brzydkim Kaczątku
3
6Simple English (simple)
Ugly duckling theorem
3
More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

The highest AI in June 2025

Language versions of the article "Ugly duckling theorem" with the highest AI in June 2025
#LanguageAI awardRelative AI
1German (de)
Ugly-Duckling-Theorem
0
2English (en)
Ugly duckling theorem
0
3Persian (fa)
قضیه جوجه‌اردک زشت
0
4Italian (it)
Teorema del brutto anatroccolo
0
5Polish (pl)
Twierdzenie o Brzydkim Kaczątku
0
6Simple English (simple)
Ugly duckling theorem
0
More...

The following table shows the language versions of the article with the highest number of citations.

The highest CI

Language versions of the article "Ugly duckling theorem" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Ugly duckling theorem
17
2German (de)
Ugly-Duckling-Theorem
3
3Italian (it)
Teorema del brutto anatroccolo
3
4Polish (pl)
Twierdzenie o Brzydkim Kaczątku
2
5Simple English (simple)
Ugly duckling theorem
1
6Persian (fa)
قضیه جوجه‌اردک زشت
0
More...

Scores

Estimated value for Wikipedia:
Simple English:
Global:
Popularity in June 2025:
Simple English:
Global:
Popularity in all years:
Simple English:
Global:
Authors in June 2025:
Simple English:
Global:
Registered authors in all years:
Simple English:
Global:
Citations:
Simple English:
Global:

Quality measures

Interwikis

#LanguageValue
deGerman
Ugly-Duckling-Theorem
enEnglish
Ugly duckling theorem
faPersian
قضیه جوجه‌اردک زشت
itItalian
Teorema del brutto anatroccolo
plPolish
Twierdzenie o Brzydkim Kaczątku
simpleSimple English
Ugly duckling theorem

Popularity rank trends

Best Rank Simple English:
#27012
05.2025
Global:
#565352
05.2025

AI rank trends

Best Rank Simple English:
#1312
05.2024
Global:
#119821
04.2021

Local AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Ugly duckling theorem from Wikipedia articles about Paradox, The Ugly Duckling, No free lunch in search and optimization, Satosi Watanabe and List of theorems. Whereas reading the article about Ugly duckling theorem people most often go to Wikipedia articles on No free lunch theorem, Satosi Watanabe, No free lunch in search and optimization, The Ugly Duckling and New riddle of induction.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

News from 15 February 2026

On 15 February 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: Jeffrey Epstein, Wuthering Heights, 2026 Winter Olympics, Epstein files, Ilia Malinin, Wuthering Heights, Ghislaine Maxwell, Lucas Pinheiro Braathen, 2026 Winter Olympics medal table, Valentine's Day.

In Simple English Wikipedia the most popular articles on that day were: XXXTentacion, Black, List of European countries, Jeffrey Epstein, Vitruvian Man, Golden Edge, Jacqueline Kennedy Onassis, List of countries, Manon Bannerman, Megan Skiendiel.

About WikiRank

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information