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
- 23
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 5m 55s
- Round cost
- $0.1515 All 24 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":"BKXG3AZI"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
1 of 23 answers in this round reuse an earlier, fully checked answer with its original evidence. No new search or check ran for those turns.
Q1
1 · Guesser asks
Is it a human-made physical object?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a human-made physical object?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The NIH defines an eyebrow as “the arch of hair on the brow” and describes its anatomical position and structure within the human periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The review states that eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body and discusses eyebrow hair follicle growth and cycling.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
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 a tangible physical entity rather than a phenomenon or abstract concept?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a tangible physical entity rather than a phenomenon or abstract concept?"}}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 source defines an eyebrow as “the arch of hair on the brow” and describes its medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Cambridge Dictionary defines eyebrow as “the line of short hairs above each eye in humans.”Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q4
1 · Guesser asks
Could a typical example be held in one hand?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Could a typical example be held in one hand?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The NIH defines the eyebrow as “the arch of hair on the brow” and describes it as a feature overlying the bony supraorbital ridge, with medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
A cited anthropometric study reports eyebrow height of approximately 10.2 ± 2.7 mm in men and 10.0 ± 2.7 mm in women, indicating the feature is small relative to a human hand.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Rather no
Q5
1 · Guesser asks
Does it occur naturally on Earth?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it occur naturally on Earth?"}}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)
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)
Source summary (model-reported)
The human eyebrow, with its contrasting hair, accentuates the movement of the brow... 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
Q6
1 · Guesser asks
Is it primarily solid under ordinary natural conditions?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it primarily solid under ordinary natural conditions?"}}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)
Source summary (model-reported)
The hair shaft is mainly composed of keratin, a strong and insoluble protein. Approximately 65–95% of the hair is composed of keratin in combination with other proteins, water, lipids, pigments and other trace elements.
Open sciencedirect.com (opens in a new tab)Source summary (model-reported)
The hair shaft is the visible, non-living portion of hair protruding above the skin. It is composed entirely of dead, heavily keratinized cells.
Open kenhub.com (opens in a new tab) 2 · Answer check returns Yes
Q7
1 · Guesser asks
Is it a geological or geographical feature of the Earth's surface?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a geological or geographical feature of the Earth's surface?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Cambridge Dictionary 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)
The page describes the eyebrow as “an area of thick, short hairs above the eye” and identifies it among accessory visual structures of the eye.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q8
1 · Guesser asks
Is it a body part or a substance produced by a living organism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a body part or a substance produced by 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 Human Malformation Terminology defines an eyebrow as “the arch of hair on the brow” and describes its anatomical position and parts in the periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)Cambridge Dictionary defines eyebrow as “the line of short hairs above each eye in humans.”Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q9
1 · Guesser asks
Is it a body part found in animals?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a body part found in animals?"}}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)
Other animals, including well documented cases of both old and new world monkeys and other mammals, have been observed to manipulate their brows as part of their communicative displays.Open carta.anthropogeny.org (opens in a new tab)
2 · Answer check returns Yes
Q10
1 · Guesser asks
Is it an external body part, normally visible without dissection?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an external body part, normally visible without dissection?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
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)Source summary (model-reported)
The eyebrow is an area of thick, short hairs above the eye. The accessory visual structures include the eyebrow, eyelids, and lacrimal apparatus.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns Yes
Q11
1 · Guesser asks
Is it also found on the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it also found on the human body?"}}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 defines the eyebrow as “The arch of hair on the brow” and describes the brow as soft tissue overlying the supraorbital ridge.
Open elementsofmorphology.nih.gov (opens in a new tab)Cambridge Dictionary defines eyebrow as “the line of short hairs above each eye in humans.”Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q12
1 · Guesser asks
Is it an appendage that projects from the main body, such as a limb or digit?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an appendage that projects from the main body, such as a limb or digit?"}}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 reference defines the eyebrow as “the arch of hair on the brow” and describes its medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The UC Museum of Paleontology glossary defines an appendage as “Any limb that extends from the body,” giving arms and legs as examples; it also includes arthropod mouthparts as limb-derived extensions.
Open evolution.berkeley.edu (opens in a new tab) 2 · Answer check returns No
Q13
1 · Guesser asks
Does it cover most of the body's exterior surface?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it cover most of the body's exterior surface?"}}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. The eyebrows usually extend further laterally than medially, in relation to the eye, and are wider and thicker medially.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)
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 No
Q14
1 · Guesser asks
Is it located on the head or face?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located on the head or face?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The page identifies the eyebrow as part of the anatomy of the periorbital region and defines it as “The arch of hair on the brow,” overlying the supraorbital ridge.
Open elementsofmorphology.nih.gov (opens in a new tab)The study concludes: “The male eyebrow sits along the supraorbital ridge and has a flat contour.” It describes the eyebrow's anatomical relation to the eye and supraorbital rim.Open pubmed.ncbi.nlm.nih.gov (opens in a new tab)
Cambridge Dictionary defines an eyebrow as “the line of short hairs above each eye in humans.”Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q15
1 · Guesser asks
Is it directly involved in one of the five traditional senses?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it directly involved in one of the five traditional senses?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
At the base of the hair follicle are sensory nerve fibers that wrap around each hair bulb. Bending the hair stimulates the nerve endings allowing a person to feel that the hair has been moved. One of the main functions of hair is to act as a sensitive touch receptor. Sebaceous glands are also associated with each hair follicle that produce an oily secretion to help condition the hair and surrounding skin. Review Date 4/1/2025.
Open medlineplus.gov (opens in a new tab)Source summary (model-reported)
There are five basic senses perceived by the body. They are hearing, touch, sight, taste, and smell. The organs involved in your five senses are: Ears (hearing), Skin and hair (touch), Eyes (sight), Tongue (taste), Nose (smell).
Open askthescientists.com (opens in a new tab) 2 · Answer check returns Yes
Q16
1 · Guesser asks
Is its primary sensory function vision?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function vision?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrows act as a barrier, diverting moisture away from the eyes ... and capturing small particles before they reach the eye. Moreover, eyebrows can shield the eyes from the glare of the sun ... Beyond their protective function, eyebrows are also great for nonverbal communication.
Open britannica.com (opens in a new tab)Source summary (model-reported)
The main function of the eyebrows is to prevent moisture, mostly salty sweat and rain, from flowing into the eye ... Together with the eyebrows, the brow ridges also shade the eyes from sunlight.
Open wikidoc.org (opens in a new tab) 2 · Answer check returns No
Q17
1 · Guesser asks
Is its primary sensory function hearing?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function hearing?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrows act as a barrier, diverting moisture away from the eyes toward the sides of the face through their shape and the direction of their hairs and capturing small particles before they reach the eye. Moreover, eyebrows can shield the eyes from the glare of the sun... Beyond their protective function, eyebrows are also great for nonverbal communication.
Open britannica.com (opens in a new tab)Source summary (model-reported)
The main function of the eyebrows is to prevent moisture, mostly salty sweat and rain, from flowing into the eye... Eyebrows also prevent debris such as dandruff and other small objects from falling into the eyes, as well as providing a more sensitive sense for detecting objects being near the eye... Eyebrows also have an important facilitative function in communication.
Open wikidoc.org (opens in a new tab) 2 · Answer check returns No
Q18
1 · Guesser asks
Is its primary sensory function smell?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function smell?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The main function of the eyebrows is to prevent moisture, mostly salty sweat and rain, from flowing into the eye. Together with the eyebrows, the brow ridges also shade the eyes from sunlight.
Open wikidoc.org (opens in a new tab)Source summary (model-reported)
Eyebrows also prevent debris such as dandruff and other small objects from falling into the eyes, as well as providing a more sensitive sense for detecting objects being near the eye, like small insects. Eyebrows also have an important facilitative function in communication.
Open wikidoc.org (opens in a new tab)Your eyebrows serve an essential function when it comes to eye and vision health: they are one of your eyes’ first means of protection.Open atlanticeyeinstitute.com (opens in a new tab)
2 · Answer check returns No
Q19
1 · Guesser asks
Is its primary sensory function taste?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function taste?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The main function of the eyebrows is to prevent moisture, mostly salty sweat and rain, from flowing into the eye... Eyebrows also prevent debris such as dandruff and other small objects from falling into the eyes... Eyebrows also have an important facilitative function in communication.
Open wikidoc.org (opens in a new tab)Source summary (model-reported)
The main biological function of eyebrows is to keep sweat and moisture away from our eyes. The arching shape and the direction of the individual hairs help to direct moisture towards the sides of our faces.
Open visionsource.com (opens in a new tab) 2 · Answer check returns No
Q20
1 · Guesser asks
Is its primary sensory function touch?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function touch?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Researchers believe the primary function of the eyebrow to be one of protection, the slope of the brow and arch drawing moisture or other debris around to the sides of the face. Because of their position and curvature, the eyebrows act as a shield against direct bright light, and stimulation of the hairs—abundantly innervated and sensitive to tactile stimulation—causes a reflex blinking of both eyelids.Open jddonline.com (opens in a new tab)
The main function of the eyebrows is to prevent moisture, mostly salty sweat and rain, from flowing into the eye. Eyebrows also prevent debris such as dandruff and other small objects from falling into the eyes, as well as providing a more sensitive sense for detecting objects being near the eye.Open wikidoc.org (opens in a new tab)
2 · Answer check returns No
Q21
1 · Guesser asks
Is it associated with the eye and primarily serves to protect or support the eye rather than detect light?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it associated with the eye and primarily serves to protect or support the eye rather than detect light?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrows act as a barrier, diverting moisture away from the eyes toward the sides of the face through their shape and the direction of their hairs and capturing small particles before they reach the eye. Moreover, eyebrows can shield the eyes from the glare of sunlight.Open britannica.com (opens in a new tab)
Source summary (model-reported)
The eyebrows, eyelids, and eyelashes play a crucial role in protecting the eyes by keeping debris and sweat out. Eyebrows prevent sweat from getting into the eyes and, when they protrude forward in bright light, create shadows in the eyes.
Open nidek-intl.com (opens in a new tab) 2 · Answer check returns Yes
Q22
1 · Guesser asks
Is it made up primarily of hairs?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it made up primarily of hairs?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The eyebrows consist of serial arched rows (5–7 rows) of hair growing along the superior orbital margin.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
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)
2 · Answer check returns Yes
Q23
1 · Guesser asks
Does it grow from the edge of an eyelid?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it grow from the edge of an eyelid?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The source defines the eyebrow as the arch of hair on the brow, with the brow overlying the bony supraorbital ridge. It separately defines eyelashes as hairs that emanate from the margins of the eyelids.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
Eyebrow hairs are described as terminal hair located on the brow, the soft tissue overlying the bony supraorbital region.
Open imaios.com (opens in a new tab) 2 · Answer check returns No
G
1 · Guesser guessesNot counted
eyebrow
The strip of hair growing on the brow above the eye.
Validator rationale The proposal identifies the general anatomical feature, the human eyebrow, rather than an isolated hair or a different object.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The strip of hair growing on the brow above the eye.","name":"eyebrow","question":null}} 2 · Validator returns Yes