You are the Guesser in a Twenty Questions benchmark. Identify the hidden subject using as few counted turns as possible. BEGIN provides only its broad category. The variation_token has no clues; do not interpret, mention, or repeat it. The category in BEGIN has a broad meaning: - person: a real human, living or historical. - fictional_character: an invented character from a story, book, comic, film, television, game, or another fictional work. - mythological_figure: a figure from mythology or traditional legend. - video_game_character: a character known from video games. - thing: a broad category covering natural and human-made entities, living or nonliving, whole entities or parts of them. Possibilities include everyday objects, tools, machines, materials, food, animals, plants, body parts, natural structures, geographical features, celestial bodies, natural phenomena, and concepts. These possibilities are not exhaustive. The target may be a general kind or one particular instance. Use questions to narrow the supplied category. These definitions are not a list of targets. Use ASK for a factual question that distinguishes candidates. Never use ASK to confirm a specific identity. Use GUESS with a name and short identifying description to name a candidate. ASK has five possible replies: - YES or NO: the evidence establishes that answer to the exact question. - RATHER_YES or RATHER_NO: evidence leans that way, but is not strong enough for a firm answer. Treat this as a clue; keep candidates fitting the opposite answer possible. - UNKNOWN: no reliable direction. It supports neither answer. Ask clear questions about verifiable properties. "Can", "sometimes", "usually", "always", and "mainly" ask different things. Do not assume that one property proves another or rules out alternatives. Qualified replies express uncertainty about your question, not how often a property applies. Before narrowing heavily, check your key assumption with a different property. After rejected guesses, reconsider earlier assumptions as well as candidates. Answers can be mistaken; check another property when stuck. Do not ignore an answer merely because it conflicts with a preferred candidate. Each ASK, rejected GUESS, or format error before the limit costs one turn. A correct GUESS costs none. After 40 counted turns, make one final GUESS; ASK is then forbidden. Identity validation uses only YES, NO, or UNKNOWN. UNKNOWN on GUESS ends the game without success. FORMAT_ERROR means your output broke the contract, was not checked for correctness, and cost one turn. Retry using its displayed formats if a turn remains. Return only the required JSON object with exactly one result action. No explanations, reasoning, or extra fields.
- Questions
- 19
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 4m 46s
- Round cost
- $0.1154 All 20 turns
Transcript
Questions and answers.
Turns are shown in the order they happened. Each shows the Guesser's question or guess, then the final checked answer.
Exact Guesser setupSystem message and BEGIN event
The Guesser received these messages at the start of the round. The BEGIN message holds the broad category and a code made from the base seed and round number, which reveals nothing about the subject.
{"category":"thing","event":"BEGIN","variation_token":"EAQCORIU"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
Q1
1 · Guesser asks
Is it a tangible physical entity or substance?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a tangible physical entity or substance?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrow: The arch of hair on the brow. The hairs of the medial part are oriented laterally, while those of the middle (central) part are oriented superolaterally.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
An eyebrow is an area of short terminal hairs above each eye that follows the shape of the lower margin of the brow ridges of some mammals.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns Yes
Q2
1 · Guesser asks
Is it a living organism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a living organism?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrow: The arch of hair on the brow. The hairs of the medial part are oriented laterally, while those of the middle (central) part are oriented superolaterally.Open elementsofmorphology.nih.gov (opens in a new tab)
Medical Definition: eyebrow noun: the ridge over the eye or the hair growing usually in a line or arch on the skin over it.Open merriam-webster.com (opens in a new tab)
2 · Answer check returns No
Q3
1 · Guesser asks
Is it made or substantially modified by humans?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it made or substantially modified by humans?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrow: The arch of hair on the brow ... The eyebrow is described as an anatomical feature of the periorbital region, with its hairs divided into medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)All the hairs on your body grow out of tiny holes on the skin called follicles. ... It’s in your genes ... Scientists have discovered one of the indicators in human DNA that will help determine if someone will grow a unibrow.Open cas.wsu.edu (opens in a new tab)
2 · Answer check returns No
Q4
1 · Guesser asks
Is it naturally found on Earth?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it naturally found on Earth?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
As humans have evolved, our body hair and facial hair have diminished over time. But eyebrows and eyelashes remained a core part of our features. ... The area of curved, delicate hairs above our eyes...
Open aao.org (opens in a new tab)Source summary (model-reported)
Eyebrows, the strip of thick, delicate hairs following the brow ridge above the eye, are an absolute difference between humans and non-human primates. ... the strip of hair on the brow ridge ... exists across sexes.
Open carta.anthropogeny.org (opens in a new tab) 2 · Answer check returns Yes
Q5
1 · Guesser asks
Is it primarily solid under ordinary surface conditions?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it primarily solid under ordinary surface conditions?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The NIH Elements of Morphology page defines the eyebrow as “the arch of hair on the brow” and separately defines the brow as “the soft tissue at the junction of the frontalis and orbicularis oculi muscles, overlying the bony supraorbital ridge.”
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The source describes eyebrows as consisting of thick skin covered by characteristic short, prominent hairs extending across the superior orbital margin.
Open sciencedirect.com (opens in a new tab)Source summary (model-reported)
The PubMed record identifies a review concerning the biology, structure, and function of eyebrow hair and describes eyebrow hair follicles as sharing the basic structure of hair follicles elsewhere on the body.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q6
1 · Guesser asks
Is it a naturally occurring geological material or formation?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a naturally occurring geological material or formation?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
An eyebrow is an area of short terminal hairs above each eye that follows the shape of the lower margin of the brow ridges of some mammals.Open en.wikipedia.org (opens in a new tab)
Eyebrow: The arch of hair on the brow.Open elementsofmorphology.nih.gov (opens in a new tab)
2 · Answer check returns No
Q7
1 · Guesser asks
Is it produced by, or does it form part of, a living organism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it produced by, or does it form part of, a living organism?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The NIH Elements of Morphology page describes the periorbital region and defines an "Eyebrow" as "The arch of hair on the brow."
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The page states that accessory visual structures include "the eyebrow, eyelids, and lacrimal apparatus" and describes the eyebrow as an area of thick, short hairs above the eye.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns Yes
Q8
1 · Guesser asks
Is it naturally part of an animal's body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it naturally part of an animal's body?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrow: The arch of hair on the brow. The brow is soft tissue at the junction of the frontalis and orbicularis oculi muscles, overlying the bony supraorbital ridge.Open elementsofmorphology.nih.gov (opens in a new tab)
Source summary (model-reported)
The source discusses human eyebrows as a facial feature and compares them with brow-related features and displays in non-human primates and other mammals.
Open carta.anthropogeny.org (opens in a new tab) 2 · Answer check returns Yes
Q9
1 · Guesser asks
Is it normally visible on the outside of the animal's body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it normally visible on the outside of the animal's body?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrow: The arch of hair on the brow. The eyebrows usually extend further laterally than medially, in relation to the eye.Open elementsofmorphology.nih.gov (opens in a new tab)
The eyebrow is an area of coarse skin hairs above the eye that follows the shape of the brow ridges.Open wikidoc.org (opens in a new tab)
2 · Answer check returns Yes
Q10
1 · Guesser asks
Is it hard and rigid under ordinary conditions?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it hard and rigid under ordinary conditions?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Brow: The soft tissue at the junction of the frontalis and orbicularis oculi muscles, overlying the bony supraorbital ridge. Eyebrow: The arch of hair on the brow.Open elementsofmorphology.nih.gov (opens in a new tab)
Externally, hair is thin, flexible tubes of dead, fully keratinized epithelial cells.Open onlinelibrary.wiley.com (opens in a new tab)
Eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, but are distinguished by their shorter anagen (growing) phase.Open pubmed.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns No
Q11
1 · Guesser asks
Does it commonly grow from an animal's skin as a covering or projecting structure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it commonly grow from an animal's skin as a covering or projecting structure?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrow: The arch of hair on the brow.Open elementsofmorphology.nih.gov (opens in a new tab)
Eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, but are distinguished by their shorter anagen (growing) phase.Open pubmed.ncbi.nlm.nih.gov (opens in a new tab)
Hair originates in the hair follicles. These follicles are located in the dermis, which is the skin layer between the epidermis ... and the fat layer. ... Eyebrows and eyelashes have a growing phase of 1 to 6 months.Open merckmanuals.com (opens in a new tab)
2 · Answer check returns Yes
Q12
1 · Guesser asks
Is it characteristic of mammals rather than birds?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it characteristic of mammals rather than birds?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
An eyebrow is an area of short terminal hairs above each eye that follows the shape of the lower margin of the brow ridges of some mammals.Open en.wikipedia.org (opens in a new tab)
Source summary (model-reported)
The human eyebrow, with its contrasting hair, accentuates the movement of the brow. Overall, it appears that eyebrows are uniquely human.
Open carta.anthropogeny.org (opens in a new tab) 2 · Answer check returns Yes
Q13
1 · Guesser asks
Does the term usually refer to an animal's coat collectively, rather than to a single strand?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does the term usually refer to an animal's coat collectively, rather than to a single strand?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Cambridge defines eyebrow as “the line of short hairs above each eye in humans.”
Open dictionary.cambridge.org (opens in a new tab)Source summary (model-reported)
Merriam-Webster defines eyebrow as “the ridge over the eye or the hair growing usually in a line or arch on the skin over it.”
Open merriam-webster.com (opens in a new tab) 2 · Answer check returns No
Q14
1 · Guesser asks
Is it a specialized tactile hair that typically grows on an animal's face?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a specialized tactile hair that typically grows on an animal's face?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The eyebrow is an area of thick, short hairs above the eye. The main function is to prevent sweat, water, and other debris falling into the eye, but they are also important to human communication and facial expressions.
Open en.wikipedia.org (opens in a new tab)Source summary (model-reported)
Vibrissae are stiff hairs on the face or nostrils of an animal, such as the whiskers of a cat. Vibrissae often act as tactile organs.
Open britannica.com (opens in a new tab)Source summary (model-reported)
Some animals additionally have specialized sinus hairs ... above the eyebrows. These tactile hairs called vibrissae ... In human beings, specialized hairs such as eye lashes and hairs inside the nostrils afford some protection from the environment. Eyebrows prevent sweat from getting into the eyes.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q15
1 · Guesser asks
Is it commonly found on the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it commonly found on the human body?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrow: The arch of hair on the brow.Open elementsofmorphology.nih.gov (opens in a new tab)
As humans have evolved, our body hair and facial hair have diminished over time. But eyebrows and eyelashes remained a core part of our features.Open aao.org (opens in a new tab)
2 · Answer check returns Yes
Q16
1 · Guesser asks
Does it typically grow from the human scalp?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it typically grow from the human scalp?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The eyebrow is the arch of hair on the brow ... overlying the bony supraorbital ridge.
Open elementsofmorphology.nih.gov (opens in a new tab)The eyebrows consist of serial arched rows (5–7 rows) of hair growing along the superior orbital margin. The eyebrow hairs are short, thin but stiff ...Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
The hairs of the scalp, eyebrows, and eyelashes are of separate types from these others and develop fairly early in life.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q17
1 · Guesser asks
Is it found on the human face?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it found on the human face?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrow: The arch of hair on the brow. The eyebrow is described as part of the anatomy of the periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)The periocular region is one of the most eye-catching three-dimensional facial features. Its anatomical subunits include ... the eyebrow.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns Yes
Q18
1 · Guesser asks
Does it grow along the edge of an eyelid?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it grow along the edge of an eyelid?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrow: The arch of hair on the brow... overlying the bony supraorbital ridge. ... Eyelashes: Hairs that emanate from the margins of the eyelids.Open elementsofmorphology.nih.gov (opens in a new tab)
The female eyebrow is positioned above the orbital rim.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns No
Q19
1 · Guesser asks
Is it located above the eye?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located above the eye?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
eyebrow: the line of hair above your eyeOpen ldoceonline.com (opens in a new tab)
Eyebrow: The arch of hair on the brow. The eyebrows usually extend further laterally than medially, in relation to the eye.Open elementsofmorphology.nih.gov (opens in a new tab)
The eyebrow is an area of thick, short hairs above the eye.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
eyebrow
The strip of short hair growing on the brow above a human eye.
Validator rationale The proposal identifies the human eyebrow as the anatomical strip/area of short hairs above the eye, matching the target body feature.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The strip of short hair growing on the brow above a human eye.","name":"eyebrow","question":null}} 2 · Validator returns Yes