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
- 14
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 3m 41s
- Round cost
- $0.0925 All 15 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 13 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 living organism or a 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 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 NCI Thesaurus classifies “Eyebrow” as an “Anatomical Structure” and defines it 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)
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. In humans, eyebrows serve functions including preventing sweat, water, and debris from falling into the eye socket.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns Yes
Q2
1 · Guesser asks
Is it a whole living organism, rather than a part, product, or material from one?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a whole living organism, rather than a part, product, or material from one?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrow (Code - C32575) ... Semantic Type(s): Anatomical Structure ... 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 hairs ... are the arch of terminal hair located on the brow — the soft tissue overlying the bony supraorbital ridge ... The eyebrow is conventionally divided into three parts.
Open imaios.com (opens in a new tab) 2 · Answer check returns No
Q3
1 · Guesser asks
Is it derived from an animal (including humans)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it derived from an animal (including humans)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The arched strip of hair on the bony ridge above each eye socket. The eyebrow is an area of thick, delicate hairs above the eye... important to human communication and facial expression.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
Eyebrow hairs ... are the arch of terminal hair located on the brow ... They are among the first visible terminal hairs to develop during embryogenesis and are present from birth onward. The anatomical hierarchy places eyebrows within human anatomy.
Open imaios.com (opens in a new tab) 2 · Answer check returns Yes
Q4
1 · Guesser asks
Is it an anatomical body part of an animal (rather than a product made or secreted by an animal)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an anatomical body part of an animal (rather than a product made or secreted by an animal)?"}}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 non-globe periorbital region is described. “Eyebrow: The arch of hair on the brow.” The source further identifies the eyebrow as having medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The NCI Thesaurus lists “Eyebrow” with semantic type “Anatomical Structure” and defines it as “The arched strip of hair on the bony ridge above each eye socket.”
Open evsexplore.semantics.cancer.gov (opens in a new tab) 2 · Answer check returns Yes
Q5
1 · Guesser asks
Is it a part of the human body specifically?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a part of the human body specifically?"}}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 sometimes referred to as the supercilium.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
Eyebrow ... Semantic Type(s): Anatomical Structure. Definitions include: “The arched strip of hair on the bony ridge above each eye socket.”
Open evsexplore.semantics.cancer.gov (opens in a new tab) 2 · Answer check returns Yes
Q6
1 · Guesser asks
Is this body part normally visible on the exterior of the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this body part normally visible on the exterior of the human body?"}}Oracle evidence3 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 source describes eyebrow hairs as “the arch of terminal hair located on the brow,” specifically on soft tissue overlying the bony supraorbital ridge, and states they are visible terminal hairs.
Open imaios.com (opens in a new tab)Source summary (model-reported)
NCI and related terminology definitions describe the eyebrow as an arched strip of hair or hairs on the brow ridge above each eye socket; one definition identifies it as an area of hairs above the eye.
Open evsexplore.semantics.cancer.gov (opens in a new tab) 2 · Answer check returns Yes
Q7
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
Q8
1 · Guesser asks
Is it a sensory organ (such as the eyes, ears, or nose)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a sensory organ (such as the eyes, ears, or nose)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The eyebrows (supercilia) are two arched eminences of integument ... and support numerous short, thick hairs ... The eyebrows consist of thickened integument ... The anatomical classification places Eyebrow under Sense organs > Eye and related structures > Accessory visual structures.
Open imaios.com (opens in a new tab)Source summary (model-reported)
Eyebrows are normally developed anatomical marking present over eyes. Their main functions include protecting the eyes from sweat and bright light, expressing emotion, and providing tactile sensitivity through sensory innervation of the eyebrow hairs.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q9
1 · Guesser asks
Does it consist of strands or filaments rather than being a solid or fleshy structure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it consist of strands or filaments rather than being a solid or fleshy structure?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Definitions include: “The arched strip of hair on the bony ridge above each eye socket” and “The arched strip of hairs (supercilia) ... above each eye socket.”Open evsexplore.semantics.cancer.gov (opens in a new tab)
The page defines an eyebrow as “an area of short terminal hairs above each eye” that follows the shape of the lower margin of the brow ridges.Open en.wikipedia.org (opens in a new tab)
Source summary (model-reported)
The review discusses eyebrow hair and states that eyebrow hair follicles share the basic structure of hair follicles elsewhere on the body, with a shorter growth phase.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q10
1 · Guesser guesses
hair
A filamentous body part growing from the skin, commonly on the human head.
Validator rationale The target is the eyebrow as a body feature, whereas the proposal identifies a generic hair or filamentous body part, not the eyebrow itself.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"A filamentous body part growing from the skin, commonly on the human head.","name":"hair","question":null}} 2 · Validator returns No
Q11
1 · Guesser asks
Is it a type of facial hair (such as eyebrows, eyelashes, a beard, or a moustache)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a type of facial hair (such as eyebrows, eyelashes, a beard, or a moustache)?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrow hairs (also referred to as the supercilium) are the arch of terminal hair located on the brow ... Anatomical hierarchy: Systemic anatomy > The integument > Skin > Hairs > Eyebrows.
Open imaios.com (opens in a new tab)Source summary (model-reported)
The biology, structure, and function of eyebrow hair ... Eyebrow hair serves many important biologic and aesthetic functions. This article reviews the structure and function of the hair follicle.
Open pubmed.ncbi.nlm.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 Yes
Q12
1 · Guesser asks
Is it located around the eyes (rather than around the mouth or on the chin/jaw)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located around the eyes (rather than around the mouth or on the chin/jaw)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
An eyebrow is an area of short terminal hairs above each eye.
Open en.wikipedia.org (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)
2 · Answer check returns Yes
Q13
1 · Guesser asks
Are they located on the margins of the eyelids?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Are they located on the margins of the eyelids?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The eyebrows are areas above the eyes with short hair. They are situated at the junction of the forehead and the upper eyelid... On the edge of each eyelid are hairs known as eyelashes.Open anatomy.app (opens in a new tab)
Source summary (model-reported)
The eyebrow is the arch of hair on the brow... Hairs that emanate from the margins of the eyelids [are identified separately].
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... Eyelashes are a set of hairs on the edges of the eyelids.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q14
1 · Guesser asks
Is it located on the brow ridge above the eyes?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located on the brow ridge above the eyes?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The eyebrow is defined as the arch of hair on the brow. The brow is soft tissue overlying the bony supraorbital ridge.
Open elementsofmorphology.nih.gov (opens in a new tab)Eyebrow: 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)
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 in some mammals, including humans.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
eyebrow
The strip of hair growing on the brow ridge above each eye.
Validator rationale The proposal identifies the general anatomical eyebrow above the eye, matching the target and not an isolated hair or cosmetic imitation.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The strip of hair growing on the brow ridge above each eye.","name":"eyebrow","question":null}} 2 · Validator returns Yes