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
- 15
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 4m 10s
- Round cost
- $0.1844 All 16 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 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 it a human-made object or artifact?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a human-made object or artifact?"}}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, delicate hairs above the eye that follows the shape of the lower margin of the brow ridges. Its semantic type is listed as “Anatomical Structure.” The source also notes that people may modify eyebrows through hair addition or removal, makeup, or piercings.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
The area of curved, delicate hairs above the eyes is described as serving a biological function by channeling unwanted moisture, including sweat and rain, away from the eye.
Open aao.org (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 No
Q2
1 · Guesser asks
Is it a living organism or a biological part of a living organism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a living organism or a biological part of a living organism?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Semantic Type(s): Anatomical Structure. Definition: The arched strip of hair on the bony ridge above each eye socket.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Eyebrows are ridges of skin covered with hair located above the eyes. They serve a dual purpose: protection and communication.Open britannica.com (opens in a new tab)
The line of short hairs above each eye in humans.Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q3
1 · Guesser asks
Is it an animal or a biological part of an animal (including humans)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an animal or a biological part of an animal (including humans)?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The source classifies “Eyebrow” as an “Anatomical Structure” and defines it as an arched strip of hair or hairs above each eye socket. It also describes the eyebrow as an area of hairs above the eye.
Open evsexplore.semantics.cancer.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)
Source summary (model-reported)
The American Academy of Ophthalmology states that eyebrows remained a core part of human features and describes them as curved, delicate hairs above the eyes.
Open aao.org (opens in a new tab) 2 · Answer check returns Yes
Q4
1 · Guesser asks
Is it a whole animal (a type or species of animal), rather than a body part, organ, or biological substance?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a whole animal (a type or species of animal), rather than a body part, organ, or biological substance?"}}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 eyebrow is sometimes referred to as the supercilium.Open elementsofmorphology.nih.gov (opens in a new tab)
the line of short hairs above each eye in humansOpen dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns No
Q5
1 · Guesser asks
Is it normally found in or part of the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it normally found in or part of the human body?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrow is classified as an "Anatomical Structure" and defined as "The arched strip of hair on the bony ridge above each eye socket."
Open evsexplore.semantics.cancer.gov (opens in a new tab)Eyebrows are ridges of skin covered with hair located above the eyes.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q6
1 · Guesser asks
Is it a distinct organ or body part located in a specific region of the body (rather than something distributed throughout the body like blood, skin, bone, or cells)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a distinct organ or body part located in a specific region of the body (rather than something distributed throughout the body like blood, skin, bone, or cells)?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrows are ridges of skin covered with hair located above the eyes.Open britannica.com (opens in a new tab)
Source summary (model-reported)
The eyebrow is classified as an Anatomical Structure. It is defined as the arched strip of hair on the bony ridge above each eye socket.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
The study describes the topographic anatomy of the eyebrow and concludes that the male eyebrow sits along the supraorbital ridge, relating its position to the eye and surrounding structures.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q7
1 · Guesser asks
Is it located in the head or neck?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located in the head or neck?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The arched strip of hair on the bony ridge above each eye socket. ... Anatomic_Structure_Is_Physical_Part_Of ... HeadOpen evsexplore.semantics.cancer.gov (opens in a new tab)
Eyebrow: The arch of hair on the brow. Brow: 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)
2 · Answer check returns Yes
Q8
1 · Guesser asks
Is it the brain, the eye, or the ear, or a specific part of one of those three?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it the brain, the eye, or the ear, or a specific part of one of those three?"}}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 distinguishes the brow from the eyebrow: the brow is soft tissue over the supraorbital ridge, while the eyebrow is the arch of hair on the brow.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
Britannica describes eyebrows as ridges of skin covered with hair located above the eyes and discusses their protective and communicative functions.
Open britannica.com (opens in a new tab) 2 · Answer check returns No
Q9
1 · Guesser asks
Is it located in or around the mouth (including the mouth itself, lips, tongue, teeth, gums, or jaw)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located in or around the mouth (including the mouth itself, lips, tongue, teeth, gums, or jaw)?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The arched strip of hair on the bony ridge above each eye socket.Open evsexplore.semantics.cancer.gov (opens in a new tab)
Source summary (model-reported)
Eyebrow: The arch of hair on the brow. The page identifies this anatomy as part of the periorbital region, which concerns the area around the eye.
Open elementsofmorphology.nih.gov (opens in a new tab)Eyebrows are ridges of skin covered with hair located above the eyes.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q10
1 · Guesser asks
Is it located in the neck or throat (including the neck or throat itself)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located in the neck or throat (including the neck or throat itself)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The arched strip of hair on the bony ridge above each eye socket.Open evsexplore.semantics.cancer.gov (opens in a new tab)
Source summary (model-reported)
Eyebrow: The arch of hair on the brow. The brow is described in the periorbital region, overlying the bony supraorbital ridge.
Open elementsofmorphology.nih.gov (opens in a new tab) 2 · Answer check returns No
Q11
1 · Guesser asks
Is it an external part or feature that is normally visible on the outside of the head or face?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an external part or feature that is normally visible on the outside of 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)
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)
Britannica describes eyebrows as “ridges of skin covered with hair located above the eyes” and notes their functions in protection and communication.
Open britannica.com (opens in a new tab)Source summary (model-reported)
The NIH Elements of Morphology describes the eyebrow as “the arch of hair on the brow” and discusses its visible medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q12
1 · Guesser asks
Is it involved in breathing or the sense of smell?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it involved in breathing or the sense of smell?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
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.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns No
Q13
1 · Guesser asks
Is it located on the lower part of the face, below the eyes (such as the cheek, chin, beard, or mustache)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located on the lower part of the face, below the eyes (such as the cheek, chin, beard, or mustache)?"}}Oracle evidence3 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 brow is the soft tissue ... overlying the bony supraorbital ridge.
Open elementsofmorphology.nih.gov (opens in a new tab)The arched strip of hair on the bony ridge above each eye socket.Open evsexplore.semantics.cancer.gov (opens in a new tab)
Eyebrows are ridges of skin covered with hair located above the eyes.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Is it made of hair or defined by a growth of hair (such as an eyebrow, eyelash, or scalp hair)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it made of hair or defined by a growth of hair (such as an eyebrow, eyelash, or scalp hair)?"}}Oracle evidence3 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)
The article describes an eyebrow as “an area of short terminal hairs above each eye” and identifies hair growth as a related anatomical topic.
Open en.wikipedia.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 Yes
Q15
1 · Guesser asks
Is it located on the face directly above the eye?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located on the face directly above the eye?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Eyebrows are ridges of skin covered with hair located above the eyes.Open britannica.com (opens in a new tab)
Source summary (model-reported)
The eyebrow is defined as the arch of hair on the brow and is described in relation to the eye within the periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab) 2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
Eyebrow
An area of short hairs above the eye that follows the shape of the lower margin of the brow ridges.
Validator rationale The proposal identifies the general human eyebrow as an area of short hairs above the eye, matching the target body feature and not a hair, eye, cosmetic, or imitation.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"An area of short hairs above the eye that follows the shape of the lower margin of the brow ridges.","name":"Eyebrow","question":null}} 2 · Validator returns Yes