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Concept in information theory
Look up perplexity in Wiktionary, the free dictionary. In information theory, perplexity is a measure of uncertainty for a discrete probability distribution
Perplexity
American artificial intelligence company
Perplexity AI, Inc., or simply Perplexity, is an American privately held software company offering a web search engine that processes user queries and
Perplexity_AI
Topics referred to by the same term
Look up perplexity in Wiktionary, the free dictionary. Perplexity is a measurement of how well a probability distribution or probability model predicts
Perplexity_(disambiguation)
Web browser developed by Perplexity AI
Comet is an AI browser based on Chromium. It was released by Perplexity AI for Microsoft Windows and macOS on July 9, 2025, for Android on November 20
Comet_(browser)
Computer scientist
entrepreneur, best known as the co-founder and Chief Technology Officer (CTO) of Perplexity AI, an AI-powered search engine launched in 2022. Yarats was born in Gomel
Denis_Yarats
American computer scientist and businessman (born 1983)
and for his early contributions to Apache Spark. He also co-founded Perplexity, an AI-powered search engine; the early-stage venture capital firm Laude
Andy_Konwinski
1767 comedy play by Thomas Hull
The Perplexities is a 1767 comedy play by the British actor and writer Thomas Hull. It was a reworking of an earlier Restoration-era play Adventures of
The_Perplexities
Type of machine learning model
Kneser–Ney smoothing, trained on 300 million words, achieved state-of-the-art perplexity on benchmark tests. During the 2000s, with the rise of widespread internet
Large_language_model
Web browser developed by Google
artificial intelligence company Perplexity AI made a bid to buy the browser from Google for $34.5 billion. Perplexity stated that the sale could remedy
Google_Chrome
1990 video game
Perplexity is a video game created by Ian Collinson for the Acorn Electron and BBC Micro and published by Superior Software in 1990. It is a pseudo 3D
Perplexity_(video_game)
Portuguese footballer (born 1985)
Rodríguez (wife) Associated clubs C.D. Nacional UD Almería Events UFL (video game) Perplexity AI Related topics Galaxy CR7 Pestana Group Jorge Mendes Category
Cristiano_Ronaldo
American entrepreneur
Instacart, Figma, GitHub, Airtable, Rippling, CoreWeave, Character.ai, Perplexity AI, and others. In June 2024, he co-founded Safe Superintelligence Inc
Daniel_Gross_(businessman)
Organization and encyclopedic website
partner of the artificial intelligence search company Perplexity.ai, providing information to Perplexity while partaking their revenue sharing program. The
World_History_Encyclopedia
American entrepreneur and venture capitalist (born 1967)
platform SentientAGI (Sentient Foundation), which seeks to challenge Perplexity and OpenAI's closed models as well as handle the problem of AI proliferation
Peter_Thiel
American sports and venue management company
Six Teams". Front Office Sports. Retrieved January 13, 2026. "Perplexity". Perplexity AI. Retrieved January 13, 2026. "Joe Gibbs Racing Receives Significant
Arctos_Partners
Web browser with integrated AI capabilities
in the browser market, including new entrants from OpenAI, Opera and Perplexity. The designation of 'AI browser' also includes established browsers that
AI_browser
Japanese light novel series
game available for the PlayStation 2 on January 31, 2008, called The Perplexity of Haruhi Suzumiya (涼宮ハルヒの戸惑, Suzumiya Haruhi no Tomadoi). It was the
Haruhi_Suzumiya
Artificial intelligence division of Meta Platforms
Additionally, Zuckerberg privately discussed acquiring Thinking Machines Lab and Perplexity AI, though the deals fell through over disputes concerning prices and
Meta_Superintelligence_Labs
Practice and strategies of increasing online visibility
In the 2020s, the rise of generative AI tools such as ChatGPT, Claude, Perplexity, and Gemini began to alter how users find information online, with AI-generated
Search_engine_optimization
Online database of companies and start-ups
2025, Crunchbase partnered with Perplexity, making Crunchbase's firmographic and funding data available within Perplexity Enterprise Pro. Crunchbase also
Crunchbase
Swisscows Ask.com Bing (Semantic ability is powered by Powerset) Lexxe Perplexity.ai SearchGPT ht://Dig Isearch Lemur Toolkit & Indri Search Engine Lucene
List_of_search_engines
2024 music composition
Perplexities after Escher is a chamber music composition by Graham Waterhouse for heckelphone, string quartet and double bass. Its five movements refer
Perplexities_after_Escher
on someone, typically causing the victim to experience embarrassment, perplexity, confusion, or discomfort. Practical jokes differ from confidence tricks
List_of_practical_joke_topics
Mischievous trick played on someone
on people, generally causing the victim to experience embarrassment, perplexity, confusion, discomfort, or irritation. The perpetrator of a practical
Practical_joke
Meta AI Microsoft AI Midjourney, Inc. Nuro NVIDIA OpenAI OpenEvidence Perplexity AI Preamble Project Prometheus RAIC Labs Reflection AI Runway Safe Superintelligence
List of artificial intelligence companies
List_of_artificial_intelligence_companies
Computer language processing metric
through a theory called the power law that states the correlation between perplexity and word error rate. Word error rate can then be computed as: W E R =
Word_error_rate
Venture capital firm
Products & Open-Source Framework". Laravel. September 5, 2024. Who Owns Perplexity AI Company?, Canvas Business Model, July 12, 2025. Miller, Ron (November
Accel_(company)
Portuguese footballing career
His Feet (2014) Ronaldo (2015) Family Kátia Aveiro Georgina Rodríguez Related Galaxy CR7 UD Almería Pestana Group UFL (video game) Perplexity AI v t e
Career_of_Cristiano_Ronaldo
Type of information retrieval using LLMs
the top-k vectors for a given prompt, scoring the generated response's perplexity, and minimizing KL divergence between the retriever's selections and the
Retrieval-augmented generation
Retrieval-augmented_generation
Artificial intelligence detection software
qualities it terms perplexity and burstiness to attempt determining if a passage was written by an AI. According to the company, perplexity is how random the
GPTZero
Technique for dimensionality reduction
_{j}p_{j|i}\log _{2}p_{j|i}.} The perplexity is a hand-chosen parameter of t-SNE, and as the authors state, "perplexity can be interpreted as a smooth measure
T-distributed stochastic neighbor embedding
T-distributed_stochastic_neighbor_embedding
Argentine-Spanish model (born 1994)
Rodríguez (wife) Associated clubs C.D. Nacional UD Almería Events UFL (video game) Perplexity AI Related topics Galaxy CR7 Pestana Group Jorge Mendes Category
Georgina_Rodríguez
Copyright law in the use of AI
included unlicensed copies of their work. Encyclopædia Britannica, Inc. sued Perplexity AI search engine in September 2025, claiming that the results pulled material
Artificial intelligence and copyright
Artificial_intelligence_and_copyright
Chapter of the New Testament
Galatians 4 is the fourth chapter of the Epistle to the Galatians in the New Testament of the Christian Bible. It is authored by Paul the Apostle for the
Galatians_4
2024 video game
Rodríguez (wife) Associated clubs C.D. Nacional UD Almería Events UFL (video game) Perplexity AI Related topics Galaxy CR7 Pestana Group Jorge Mendes Category
UFL_(video_game)
Length of a line segment
SMC DBCV index Ranking MRR NDCG AP Computer vision PSNR SSIM IoU NLP Perplexity BLEU MAUVE Deep learning Inception score FID Recommender system Coverage
Euclidean_distance
American computer scientist and software engineer
an angel investor, having invested in dozens of AI startups including Perplexity, Roboflow, Sakana AI and World Labs. Dean and his wife, Heidi Hopper,
Jeff_Dean
caste system, and the temple system. Historians say that the book has perplexity and mythical story as it written by various authors in various durations
Mattakallappu_Manmiyam
Friend of Hindu deity Krishna
Uddhava after his forthcoming departure. It commences with Uddhava's perplexity after he saw the impending destruction of the Yaduvamsha community, in
Uddhava
His Feet (2014) Ronaldo (2015) Family Kátia Aveiro Georgina Rodríguez Related Galaxy CR7 UD Almería Pestana Group UFL (video game) Perplexity AI v t e
List of career achievements by Cristiano Ronaldo
List_of_career_achievements_by_Cristiano_Ronaldo
2025 assassination in Orem, Utah, U.S.
foreign policy objectives. Artificial intelligence tools such as Grok, Perplexity AI, and AI Overviews also disseminated misinformation. Political consultant
Assassination_of_Charlie_Kirk
American legal technology company
Headquarters (NCH) and Inc Authority brands, in 2025, and partnered with Perplexity AI, an artificial intelligence company, to enhance its legal technology
LegalZoom
Country within the United Kingdom
2020. Retrieved 16 November 2020. Wormald, Jenny (2005). "Confidence and Perplexity: The Seventeenth Century". In Wormald, Jenny (ed.). Scotland: A History
Scotland
Queen of England from 1533 to 1536
Literature. Vol. III. New York: George Dearborn. p. 70. And I am in such a perplexity, that my mind is clean amazed: for I never had better opinion in woman
Anne_Boleyn
Type of cooperative argumentative dialogue
Socratic method can foster creative and critical thinking through the use of perplexity. However, Boghossian cautions against misapplications of the method that
Socratic_method
Emoticon denoting cuteness, smiling or happiness
furry fandom) that may also denote cuteness, as well as curiosity and perplexity (often the response "what's this?"). owo gained popularity in 2018; as
Uwu
Comparison of chatbots – ChatGPT, DeepSeek, Google Gemini, Microsoft Copilot, Perplexity AI. Comparison of online source code playgrounds – JDoodle, Replit, CodePen
List of online educational resources
List_of_online_educational_resources
AI-based personal assistant device
vision features, music playback, and some third-party integrations. Perplexity.ai was one of the AI services used to answer user queries. In 2024, Rabbit
Rabbit_r1
fear of infamy or under the influence of a debilitation, bewilderment or perplexity caused by giving birth and is punished with imprisonment for up to four
Murder_in_Danish_law
Statistical law in machine learning
performance include: Negative log-likelihood per token (logarithm of perplexity) for language modeling; Accuracy, precision, recall, and F1 score for
Neural_scaling_law
Unit of information
_{i}p_{i}\ln p_{i}} it is implicitly giving a quantity with nat as the unit. Perplexity This implicitly also makes the nat the coherent unit of information in
Nat_(unit)
American weather forecast service corporation
AccuWeather signed a partnership with Perplexity to integrate its weather forecasts and data into Perplexity's AI-powered search platform. In 2026, AccuWeather
AccuWeather
2013 studio album by Ocean Colour Scene
God Made Everyone" Fowler 3:28 6. "Weekend" Fowler 3:16 7. "Professor Perplexity" Fowler Cradock 3:05 8. "George's Tower" Fowler 1:21 9. "I Don't Want
Painting_(album)
Tendency to misexecute routinized tasks if one tries to execute them consciously
on a fanciful note by imagining the "disastrous results in the way of perplexity" that could result from such an investigation, quoting the poem and mentioning
The_Centipede's_Dilemma
Kind of greeting
Contemporary Ways of Welcome and Hospitality (2006), p. 4. William Desmond, Perplexity and Ultimacy: Metaphysical Thoughts from the Middle (1995), p. 146. "Discussion
Welcome
Singapore-based technology company
a voice assistant called Noa and featured an AI search engine called Perplexity. They came at a time when other companies introduced similar products
Brilliant_Labs
AI digital assistant
development process while avoiding human error. CEO Aravind Srinivas of Perplexity.ai offered praise to Devin, claiming that it "seemed to be 'the first
Devin_AI
Software used to access websites
common. This includes both new entrants to the browser market, such as Perplexity Comet and ChatGPT Atlas, and established browsers that added AI features
Web_browser
Football stadium in Funchal, Madeira, Portugal
His Feet (2014) Ronaldo (2015) Family Kátia Aveiro Georgina Rodríguez Related Galaxy CR7 UD Almería Pestana Group UFL (video game) Perplexity AI v t e
Estádio_da_Madeira
Type of bakery specializing in sweet baked goods and desserts, and the good themselves
https://training.gov.au/Training/Details/SIT40721/qualdetails?utm_source=perplexity. Retrieved 2025-07-05. {{cite web}}: Missing or empty |title= (help) Bouayed
Pâtisserie
British monthly magazine
the source of ground-breaking brain teasers, under a column called "Perplexities", first written by Henry Dudeney. Dudeney introduced many new concepts
The_Strand_Magazine
Canadian computer scientist (born 1974)
it 'a new beginning'". Fortune. Sullivan, Mark (June 23, 2025). "This Perplexity cofounder wants to help AI breakthroughs graduate from university labs"
Joëlle_Pineau
English chemist and polymath (1733–1804)
early biographer writes, "whatever he knows or thinks he tells: doubts, perplexities, blunders are set down with the most refreshing candour." Priestley also
Joseph_Priestley
British lawyer and academic (born 1947)
(1989). "Genocide and International Law". International Law at a Time of Perplexity. pp. 797–820. doi:10.1163/9789004633704_046. ISBN 978-90-04-63370-4. University
Malcolm_Shaw_(lawyer)
Battle of the American Civil War
withdrew and arrived at Gettysburg on the second day of the battle, to the perplexity and annoyance of General Robert E. Lee. Carlisle was settled in 1751,
Battle_of_Carlisle
American artificial intelligence company
of Meta Platforms Mistral AI – French artificial intelligence company Perplexity AI – American artificial intelligence company xAI – American artificial
OpenAI
How many different types are in a dataset
logarithms (see above). In other domains, this statistic is also known as the perplexity. The general equation of diversity is often written in the form q D =
Diversity_index
Video-focused social media platform
Anthony (18 January 2025). "Perplexity AI submits bid to merge with TikTok". TechCrunch. Retrieved 18 January 2025. "Perplexity AI bids to merge with TikTok
TikTok
Web browser fork based on Firefox
related stuff in LibreWolf. If you see some features like that (like Perplexity search recently, or the link preview feature now) it is solely because
LibreWolf
Mathematical graph relating to chess
Across the Board: The Mathematics of Chessboard Problems. Paradoxes, perplexities, and mathematical conundrums for the serious head scratcher, Princeton
Knight's_graph
Museum on the Portuguese island of Madeira
His Feet (2014) Ronaldo (2015) Family Kátia Aveiro Georgina Rodríguez Related Galaxy CR7 UD Almería Pestana Group UFL (video game) Perplexity AI v t e
Museu_CR7
1706 siege
documentary sources explain that the escape of Philip V caused great perplexity in all the chancelleries of Europe, but especially in that of Versailles
Siege_of_Barcelona_(1706)
American philosopher (1919–2009)
however, Mates finds that skeptical arguments lead to unsatisfactory perplexity rather than ataraxia. Stoic Logic, Berkeley: University of California
Benson_Mates
1980 film by Stanley Kubrick
complexity: "The final scene alone demonstrates what a rich source of perplexity The Shining offers ... look beyond the simplicity and the Overlook reveals
The_Shining_(film)
Ricochet (1989) Baron (1989) Last Ninja 2 (1989, BBC/Electron ports) Perplexity (1990) Hyperball (1990) Pandemonium (1990) Hostages (1990) Superior Golf
Superior_Interactive
Pikunikku/ Nishi-iki ressha ピクニック / 西行き列車 （1974.07.01） Bītoruzu wa mō kikanai/ perplexity ビートルズはもう聞かない / 惑 （1974.12.01） Ippon no tabako/ gin'yūshijin 一本の煙草 / 吟遊詩人 （1975
Garo_(band)
Jewish organization addressing antisemitism and Israel-related issues
Israel"; and "A Campus Guide to Identifying Antisemitism in a Time of Perplexity". In September 2020, over 100 Jewish leaders sent a letter to Joe Biden
Nexus_Project
Self-described religious prophetess, 1750–1814
claiming: "War, disease, crime and banditry, distress of nations and perplexity will increase until the Bishops open Joanna Southcott's box." From 1957
Joanna_Southcott
American Seventh-day Adventist minister (1858–1935)
Its Relation to the Eastern Question and Armageddon (1917) A World in Perplexity. Review and Herald Publishing Association. 1918. OL 23660937M. Christ
A._G._Daniells
American semiconductor company
record. Also in February 2025, Cerebras announced a partnership with Perplexity AI's Sonar model, which runs on Cerebras chips at 1,200 tokens per second
Cerebras_Systems
American investment firm
all your marketing data together". TechCrunch. Retrieved July 8, 2025. "Perplexity AI valued at $520 mln in funding from Bezos, Nvidia". Reuters. January
Institutional Venture Partners
Institutional_Venture_Partners
Topics referred to by the same term
on someone, generally causing the victim to experience embarrassment, perplexity, confusion, or discomfort Shenanigan Kids, a 1920 animated series by Bray
Shenanigans
French writer and theorist (born 1947)
and the S.I.? (originally published in La Banquise, no. 4, 1986) The Perplexities of the Middle Eastern Conflict Grey September (on the issues raised after
Gilles_Dauvé
Play written by T. S. Eliot
for the enlightenment of the audience but are expressions of their own perplexity: There is nothing at all to be done about it; There is nothing to do about
The_Family_Reunion
Instrument of physical penance in some Christian denominations
the state of her soul, sought spiritual guidance in the midst of her perplexities, and created a written forum for her continued self-examination. She
Discipline (instrument of penance)
Discipline_(instrument_of_penance)
Software system for finding relevant information on the Web
2016 Kiddle Active, Google Search 2017 Presearch Active 2018 Kagi Active 2020 Petal Active 2021 Brave Search Active You.com Active 2022 Perplexity Active
Search_engine
Galaxy in the constellation Sextans
Rodríguez (wife) Associated clubs C.D. Nacional UD Almería Events UFL (video game) Perplexity AI Related topics Galaxy CR7 Pestana Group Jorge Mendes Category
Cosmos_Redshift_7
Spanish scholar
circular letter to all the rabbis, asserting that he was able to solve all perplexities, and asking them to send all doubtful questions to him. In this letter
Moses_Botarel
Overview of and topical guide to machine learning
Path dependence Pattern language (formal languages) Peltarion Synapse Perplexity Persian Speech Corpus Pietro Perona Pipeline Pilot Piranha (software)
Outline_of_machine_learning
Nautical charts, first made in the 13th century
(2025-01-02). "The origin of nautical cartography: certitudes, doubts, and perplexities". International Journal of Cartography. 11 (1): 63–92. Bibcode:2025IJCar
Portolan_chart
1889 to 1913 books by the Langs
stories, and tales from Washington Irving. "The Drowned Buccaneer" "The Perplexity of Zadig" "The Return of the Dead Wife" "Young Amazon Snell" "The Good
The_Langs'_Fairy_Books
Iranian film and theatre director
Happy Days!", (2025) https://www.imdb.com/title/tt38952240/?utm_source=perplexity&ref_=ext_shr_lnk The movie A Dragon Arrives! (2015) (directed by Mani
Homayoun_Ghanizadeh
1810 book by Johann Wolfgang von Goethe
ultimately rejects Goethe's theory as the work of a poet, but expresses his perplexity at how they can be in such agreement about the facts of the matter, but
Theory_of_Colours
Roman Stoic philosopher and senator (c. 35–93)
in 133 and ordinary consul in 162) as his grandson, only increases the perplexity. In his monograph on Roman naming practices, Olli Salomies attempted to
Arulenus_Rusticus
South Korean poet and academic (born 1976)
a moment that feeling becomes more complex, and then often changes to perplexity. Expressions such as "A blue-bellied fish lies flush with the rope, staring
Yi_Geun-hwa
South African political activist (born 1985)
-facts-related-to-suspension-disciplinary-charge-against-mr-chumani-maxwele https://www.saflii.org/za/cases/ZAWCHC/2020/188.html?utm_source=perplexity
Chumani_Maxwele
American painter
slow moving minor-key vocal and instrumental pieces dripping with smoky perplexity and shrouded mystery. Grey hazes on the wharf, the human mystique, regret
Tor_Lundvall
American philosopher
and the first-person perspective), philosophical method and the role of perplexity in philosophical inquiry, and above all, philosophy in relation to children
Gareth_Matthews
1953 book
document is of interest in that it reveals the thoughts, emotions and perplexities of a Victorian youngster brought up a little prior to the 'naughty nineties'
The_Boy_Who_Saw_True
1611 book by John Donne
that, but (as they say) even to possesse the Divell, apprehended this perplexity in Lucifer. Ignatius is subsequently ejected from Hell and ordered to
Ignatius_His_Conclave
PERPLEXITY
PERPLEXITY
Boy/Male
Biblical
Perplexity.
Biblical
tribulation; perplexity
Biblical
perplexity
Boy/Male
Australian, Biblical
Perplexity
Girl/Female
Biblical
Tribulation, perplexity.
PERPLEXITY
PERPLEXITY
Girl/Female
Greek
Kind or innocent.
Boy/Male
Anglo, British, English
From the Oak Tree Meadow
Boy/Male
Indian, Malayalam
A King
Girl/Female
German, Latin
Noble; Kind
Girl/Female
Hebrew
Flower.
Boy/Male
Gujarati, Indian, Kannada
Star
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Tamil, Telugu
The One who Brings Hope
Boy/Male
Anglo, British, English, German
Defender; Old Friend
Girl/Female
African, Australian, Nigerian
Mother's Daughter
Girl/Female
Tamil
Haridarpa | ஹரீதரà¯à®ªà®¾
Name of a Raga
PERPLEXITY
PERPLEXITY
PERPLEXITY
PERPLEXITY
PERPLEXITY
n.
Something not easily solved; an intricacy; a difficulty; a perplexity; a problem.
n.
A disagreeable and embarrassing predicament out of which one can not get without undergoing, as it were, a painful rubbing or scraping; a perplexity; a difficulty.
n.
A state of perplexity or anxiety; confusion; bother; agitation.
v. t.
To involve, as in difficulty or perplexity; to perplex.
v. t.
To catch with a snare; to insnare; to entangle; hence, to bring into unexpected evil, perplexity, or danger.
n.
A pinching condition; perplexity; trouble; distress.
n.
Difficulty; perplexity; embarrassment.
n.
The state of being puzzled; perplexity.
v. i.
To fall into perplexity and confusion.
v.
The state of being puzzled; perplexity; as, to be in a puzzle.
n.
Confusion of thought; perplexity; uncertainty; state of bewilderment.
v. i.
A state of perplexity or embarrassment; as, to be at a stand what to do.
n.
Any cause of stumbling, perplexity, or error.
n.
The quality or state of being perplexed or puzzled; complication; intricacy; entanglement; distraction of mind through doubt or difficulty; embarrassment; bewilderment; doubt.
v. t.
To free from perplexity.
n.
The state or quality of being intricate or entangled; perplexity; involution; complication; complexity; that which is intricate or involved; as, the intricacy of a knot; the intricacy of accounts; the intricacy of a cause in controversy; the intricacy of a plot.
v. t.
To bring into a state of uncertainty, perplexity, or difficulty.
a.
Fig.: A condition of narrowness or restriction; doubt; distress; difficulty; poverty; perplexity; -- sometimes in the plural; as, reduced to great straits.
n.
A state of difficulty or perplexity; doubt; uncertainty.
n.
Bewilderment; perplexity.