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
- 17
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 1m 46s
- Round cost
- $0.0404 All 18 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.
8 of 15 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 the subject a living organism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject 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 (Fig. 2) [Goss, [ 1959 ]].Open elementsofmorphology.nih.gov (opens in a new tab)
Source summary (model-reported)
The article describes eyebrow hair and its follicles, including their structure, growth, and cycling, treating them as hair associated with an anatomical feature rather than as an organism.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q2
1 · Guesser asks
Is the subject primarily a human-made physical object?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject primarily a human-made physical object?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The source describes eyebrows as a strip of thick, delicate hairs following the brow ridge above the eye and discusses them as a human anatomical feature with protective and communicative functions.
Open carta.anthropogeny.org (opens in a new tab)Source summary (model-reported)
The clinical review states that human eyebrows are composed of short, obliquely set hairs arranged in arches above the orbits, and that they protect the eyes from light, sweat, and dust.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab)Source summary (model-reported)
The source defines an eyebrow as an area of short terminal hairs above each eye and notes that cosmetic methods can alter its appearance by adding or removing hair, changing color, or changing position.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q3
1 · Guesser asks
Is the subject a physical thing found in nature?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a physical thing found in nature?"}}Oracle evidence2 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, delicate hairs above the eye that follows the shape of the lower margin of the brow ridges. Semantic Type(s): Anatomical Structure.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
Eyebrows are described as a strip of hairs following the brow ridge above the eye; in humans they serve physical and social functions.
Open carta.anthropogeny.org (opens in a new tab) 2 · Answer check returns Yes
Q4
1 · Guesser asks
Is it a geographical feature on Earth?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a geographical feature on Earth?"}}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)
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 No
Q5
1 · Guesser asks
Is it a substance or material?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a substance or material?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Cambridge defines an 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 defines an eyebrow as “an area of short terminal hairs above each eye” and describes its functions in preventing sweat, water, and debris from falling into the eye and in facial communication.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q6
1 · Guesser asks
Is it a celestial body or an astronomical object?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a celestial body or an astronomical object?"}}Oracle evidence2 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, delicate hairs above the eye ... Semantic Type(s): Anatomical Structure.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
A celestial body, or less commonly celestial object, is an aggregation of matter in the universe, such as a planet, star, or nebula, that can be considered as a single unit.
Open merriam-webster.com (opens in a new tab) 2 · Answer check returns No
Q7
1 · Guesser asks
Is it a part or product of a living organism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a part or product 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 source defines the eyebrow as “the arch of hair on the brow” and describes it as an anatomical periorbital feature, including medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The source describes eyebrows as important anatomical structures and states that they help protect the eyes from particulate matter and sweat.
Open ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q8
1 · Guesser asks
Is it a part of the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a part of the human body?"}}Oracle evidence3 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 (Fig. 2) ... Based on observed localized abnormalities of the eyebrow, it is useful to divide the eyebrow into three parts: medial, middle (central), and lateral.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
Your eyebrows are the curved areas of hair on your face above each of your eyes. ... Definitions of eyebrow: noun the arch of hair above each eye.
Open vocabulary.com (opens in a new tab)the line of short hairs that humans have above each eyeOpen dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q9
1 · Guesser asks
Is it an internal organ?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an internal organ?"}}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)
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)
Organs are structures inside your body that have specialized jobs. They include internal organs like your heart and brain, plus external ones like your skin.Open my.clevelandclinic.org (opens in a new tab)
2 · Answer check returns No
Q10
1 · Guesser asks
Is it normally visible on the outside of the body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it normally visible on the outside of the body?"}}Oracle evidence3 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 eyebrow is sometimes referred to as the supercilium.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)
2 · Answer check returns Yes
Q11
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
Q12
1 · Guesser asks
Is its primary function related to one of the senses?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is its primary function related to one of the senses?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
In humans, eyebrows serve two main functions: first, prevention of sweat, water, and other debris from falling down into the eye socket, and second, communication through facial expression. Recent research, however, suggests eyebrows in humans developed as a means of communication and that this is their primary function.
Open en.wikipedia.org (opens in a new tab)Source summary (model-reported)
Main function of eyebrows is to protect eyes and prevent flowing of salty sweat to eyes. The position and curvature of the eyebrow allows it to shield the eyes from bright light and is an effective barrier to liquids running from the forehead into the eye.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q13
1 · Guesser asks
Is it involved in vision?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it involved in vision?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The area of curved, delicate hairs above our eyes are believed to channel unwanted moisture—sweat and rain in particular—away from the eye to help keep vision clear.Open aao.org (opens in a new tab)
The position and curvature of the eyebrow allows it to shields the eyes from bright light and it is an effective barrier to liquids running from the forehead into the eye. The main physical function is to prevent flowing of salty sweat to eyes.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns Yes
Q14
1 · Guesser guesses
Eye
The organ of sight.
Validator rationale The proposal identifies the eye, which is a different anatomical organ from the eyebrow.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The organ of sight.","name":"Eye","question":null}} 2 · Validator returns No
Q15
1 · Guesser asks
Does it primarily protect the eye?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it primarily protect the eye?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The eyebrow is an area of thick, delicate hairs above the eye... Their main function is to protect the eye, but they are also important to human communication and facial expression.Open evsexplore.semantics.cancer.gov (opens in a new tab)
Source summary (model-reported)
The main function of eyebrows is to protect eyes and prevent flowing of salty sweat to eyes. The position and curvature of the eyebrow allows it to shield the eyes from bright light and is an effective barrier to liquids running from the forehead into the eye.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab)Source summary (model-reported)
Experts say that eyebrows have two main purposes: keeping moisture out of our eyes and communication. Eyebrows move wetness from sweat and rain away from the eyes, and can also reduce incoming light and keep dirt away.
Open healthline.com (opens in a new tab) 2 · Answer check returns Yes
Q16
1 · Guesser asks
Does it consist mainly of hair?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it consist mainly of hair?"}}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 hairs of its medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The PubMed record identifies eyebrow hair as the subject of a review covering its biology, structure, function, follicles, growth, and physiology.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q17
1 · Guesser guesses
Eyelashes
Hairs along the edges of the eyelids that help protect the eyes.
Validator rationale Eyelashes are hairs along the eyelid edges, whereas the target is the eyebrow above the eye; they are distinct anatomical features.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Hairs along the edges of the eyelids that help protect the eyes.","name":"Eyelashes","question":null}} 2 · Validator returns No
G
1 · Guesser guessesNot counted
Eyebrow
The strip of hair above the eye that helps protect it.
Validator rationale The proposal identifies the human eyebrow as the hair-bearing feature above the eye, matching the target body feature and its function.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The strip of hair above the eye that helps protect it.","name":"Eyebrow","question":null}} 2 · Validator returns Yes