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 42s
- Round cost
- $0.1691 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":"AMZAISLM"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
3 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 human-made?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it human-made?"}}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 describes its anatomical position and parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The PubMed record describes eyebrow hair follicles, their morphogenesis and cycling, and identifies eyebrow hair as a biological anatomical subject.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab)Source summary (model-reported)
The American Academy of Ophthalmology describes eyebrows as curved hairs above the eyes and discusses their biological functions, while separately noting that people may wax, tweeze, or dye them.
Open aao.org (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?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a tangible physical entity?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
The line of short hairs that humans have above each eye.Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q4
1 · Guesser asks
Is it a celestial body or other object found primarily in outer space?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a celestial body or other object found primarily in outer space?"}}Oracle evidence1 model-reported source
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.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q5
1 · Guesser asks
Is it a naturally occurring substance or material rather than a distinct geographic feature?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a naturally occurring substance or material rather than a distinct geographic feature?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The source defines an eyebrow as an area of short terminal hairs above each eye, following the shape of the brow ridges.
Open en.wikipedia.org (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 No
Q6
1 · Guesser asks
Is it a natural geographic or geological feature?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a natural geographic or geological feature?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The NIH's anatomy terminology defines an eyebrow as "The arch of hair on the brow" and discusses it within the anatomy of the periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The article describes the eyebrow as one of the anatomical subunits of the periocular region and a facial feature.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q7
1 · Guesser asks
Is it a body part or a structure 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 structure 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 anatomy of the various structures is described in more detail below. ... Eyebrow: The arch of hair on the brow.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
eyebrow noun [ C ] ... the line of short hairs that humans have above each eye
Open dictionary.cambridge.org (opens in a new tab) 2 · Answer check returns Yes
Q8
1 · Guesser asks
Is it part of the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it part of the human body?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The NIH Human Malformation Terminology page defines “Eyebrow” as “The arch of hair on the brow” within its anatomy of 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)
Source summary (model-reported)
Vocabulary.com describes eyebrows as the curved areas of hair on the face above the eyes and classifies hair as a covering for the body or parts of it.
Open vocabulary.com (opens in a new tab) 2 · Answer check returns Yes
Q9
1 · Guesser asks
Is it an internal body part, normally hidden beneath the skin?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an internal body part, normally hidden beneath the skin?"}}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 describes its hairs as oriented in different directions across the eyebrow.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The American Academy of Ophthalmology describes eyebrows as “the area of curved, delicate hairs above our eyes” and discusses their visible functions, including channeling moisture away from the eyes.
Open aao.org (opens in a new tab)Source summary (model-reported)
e-Anatomy describes the eyebrows as consisting of thickened integument, connected beneath with the orbicularis oculi, corrugator, and frontalis muscles.
Open imaios.com (opens in a new tab) 2 · Answer check returns No
Q10
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
Q11
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
Q12
1 · Guesser asks
Is its primary sensory function detecting light?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function detecting light?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Britannica describes eyebrows as a barrier that diverts moisture and captures small particles, and says they can shield the eyes from the glare of the sun. It also identifies nonverbal communication as another function.
Open britannica.com (opens in a new tab)Source summary (model-reported)
The American Academy of Ophthalmology says eyebrows channel sweat and rain away from the eyes, help block out light, and filter dust and dirt. It also describes roles in communication and facial expression.
Open aao.org (opens in a new tab) 2 · Answer check returns No
Q13
1 · Guesser asks
Is its primary sensory function detecting sound?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function detecting sound?"}}Oracle evidence3 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 the sun... Beyond their protective function, eyebrows are also great for nonverbal communication.Open britannica.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... Together with the eyebrows, the brow ridges also shade the eyes from sunlight.Open wikidoc.org (opens in a new tab)
The Eyebrows (supercilia) are two arched eminences of integument, which surmount the upper circumference of the orbits, and support numerous short, thick hairs.Open imaios.com (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Is its primary sensory function detecting odors?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function detecting odors?"}}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 and capturing small particles before they reach the eye. They also shield the eyes from glare and contribute to 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 from falling into the eyes and provide a more sensitive sense for detecting objects near the eye, such as small insects.
Open wikidoc.org (opens in a new tab) 2 · Answer check returns No
Q15
1 · Guesser asks
Is its primary sensory function detecting taste?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary sensory function detecting taste?"}}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... 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
Q16
1 · Guesser asks
Does it also cover substantial areas of the body outside the head and face?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it also cover substantial areas of the body outside the head and face?"}}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 an eyebrow as “The arch of hair on the brow” and describes the brow as soft tissue overlying the bony supraorbital ridge. It also discusses the eyebrow within 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 No
Q17
1 · Guesser asks
Is it part of, or located directly around, the mouth?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it part of, or located directly around, the mouth?"}}Oracle evidence2 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)
Source summary (model-reported)
The male eyebrow sits along the supraorbital ridge. The study describes the eyebrow's location relative to the eye, pupil, lateral canthus, and supraorbital rim.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q18
1 · Guesser asks
Is it made primarily of keratin, like hair or nails?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it made primarily of keratin, like hair or nails?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Hair is a filament that grows from a hair follicle in the dermis of the skin. It consists mainly of tightly packed, keratin-filled cells called keratinocytes.Open humanbiology.pressbooks.tru.ca (opens in a new tab)
Nails and hair contain mostly keratin. ... Eyelashes and eyebrows protect the eyes from water, dirt, and other irritants. Hairs in the nose trap dust particles and microorganisms.Open bio.libretexts.org (opens in a new tab)
2 · Answer check returns Rather yes
Q19
1 · Guesser asks
Is it located directly around the eyes?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located directly around the eyes?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
the line of short hairs above each eye in humansOpen dictionary.cambridge.org (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)
2 · Answer check returns Rather yes
Q20
1 · Guesser asks
Is it a type of hair?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a type of hair?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The source defines an eyebrow as “The arch of hair on the brow,” distinguishing the eyebrow feature from eyelashes and other anatomical structures.Open elementsofmorphology.nih.gov (opens in a new tab)
Source summary (model-reported)
The article is specifically titled “The biology, structure, and function of eyebrow hair” and states that eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, while differing in their shorter growing phase.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q21
1 · Guesser asks
Is it a movable fold that can close over and protect the eye?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a movable fold that can close over and protect the eye?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The NIH Elements of Morphology page defines the eyebrow as “the arch of hair on the brow” and defines the eyelid as “a fold of skin and its subcutaneous components that covers the anterior globe.”Open elementsofmorphology.nih.gov (opens in a new tab)
The American Academy of Ophthalmology states: “An eyelid is a fold of skin that closes over the eye to protect it.”Open aao.org (opens in a new tab)
Source summary (model-reported)
StatPearls distinguishes the eyelids and eyebrows as separate accessory structures of the eye and states that the eyelids cover the eyes and protect them.
Open ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q22
1 · Guesser asks
Is it a transparent structure that covers the front of the eye?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a transparent structure that covers the front of the eye?"}}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... Eyelid ... A fold of skin and its subcutaneous components that covers the anterior globe.Open elementsofmorphology.nih.gov (opens in a new tab)
The area of curved, delicate hairs above our eyes are believed to channel unwanted moisture—sweat and rain in particular—away from the eye.Open aao.org (opens in a new tab)
The eyebrow is an area of thick, short hairs above the eye. An eyelid is a thin fold of skin that covers and protects the eye.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns No
Q23
1 · Guesser asks
Is it located above the eye and associated with facial expression?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located above the eye and associated with facial expression?"}}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.Open elementsofmorphology.nih.gov (opens in a new tab)
Source summary (model-reported)
The occipitofrontalis frontal belly inserts into the skin of the eyebrow and forehead; its actions include raising the eyebrows and producing a surprised expression.
Open ncbi.nlm.nih.gov (opens in a new tab)Source summary (model-reported)
The table associates raised or lowered eyebrows with facial action units for anger, sadness, and fear.
Open ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
eyebrow
The strip of hair and underlying facial feature above an eye.
Validator rationale The proposal identifies the human eyebrow as the facial feature above the eye, not merely an isolated hair or unrelated object.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The strip of hair and underlying facial feature above an eye.","name":"eyebrow","question":null}} 2 · Validator returns Yes