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
- 19
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 6m 28s
- Round cost
- $0.0899 All 20 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.
1 of 19 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?
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
Q2
1 · Guesser asks
Is it primarily human-made rather than naturally occurring?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it primarily human-made rather than naturally occurring?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrows, the strip of thick, delicate hairs following the brow ridge above the eye... In humans, they serve a variety of functions, ranging from the physically practical (blocking sweat) to the social (recognition, emotional expression).
Open carta.anthropogeny.org (opens in a new tab)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)
the line of short hairs above each eye in humansOpen dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns No
Q3
1 · Guesser asks
Is it located in outer space beyond Earth's atmosphere?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located in outer space beyond Earth's atmosphere?"}}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 brow is described as soft tissue overlying the bony supraorbital ridge, and the eyebrows are discussed in relation to the eye.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The eyebrow sits along the supraorbital ridge. The study describes the eyebrow's three-dimensional relation and location relative to the eye and supraorbital rim.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q4
1 · Guesser asks
Is it a persistent physical object or substance rather than a transient event or phenomenon?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a persistent physical object or substance rather than a transient event or phenomenon?"}}Oracle evidence3 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)
Source summary (model-reported)
Eyebrow: The arch of hair on the brow. The eyebrow is described as an anatomical feature of the periorbital region, with medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
Eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, but are distinguished by their shorter anagen (growing) phase.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q5
1 · Guesser asks
Is it a specific named individual place or feature rather than a general kind of material or object?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a specific named individual place or feature rather than a general kind of material or object?"}}Oracle evidence2 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 NIH Elements of Morphology page defines “Eyebrow” as “The arch of hair on the brow” and discusses eyebrows as anatomical structures of the periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab) 2 · Answer check returns No
Q6
1 · Guesser asks
Is it solid under typical conditions on Earth's surface?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it solid under typical conditions on Earth's surface?"}}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 defines an eyebrow as “the arch of hair on the brow.”
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The source describes the hair shaft as a “three layered keratinized structure,” consisting of the medulla, cortex, and cuticle.
Open mobile.fpnotebook.com (opens in a new tab)Source summary (model-reported)
An eyebrow is described as an area of short terminal hairs above each eye.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns Yes
Q7
1 · Guesser asks
Is it a type of rock, mineral, metal, or soil material?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a type of rock, mineral, metal, or soil material?"}}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 (Fig. 2).Open elementsofmorphology.nih.gov (opens in a new tab)
Eyebrows, the strip of thick, delicate hairs following the brow ridge above the eye, are an absolute difference between humans and non-human primates.Open carta.anthropogeny.org (opens in a new tab)
Source summary (model-reported)
The biology, structure, and function of eyebrow hair. Eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, but are distinguished by their shorter anagen (growing) phase.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q8
1 · Guesser asks
Is it a geographical landform or terrain feature, such as a mountain, valley, canyon, cave, island, or glacier?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a geographical landform or terrain feature, such as a mountain, valley, canyon, cave, island, or glacier?"}}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) ... The eyebrow is sometimes referred to as the supercilium.Open elementsofmorphology.nih.gov (opens in a new tab)
Source summary (model-reported)
The eyebrow is defined 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
Q9
1 · Guesser asks
Is it composed of or derived from material produced by a living plant, animal, or other organism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it composed of or derived from material produced by a living plant, animal, or other organism?"}}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)
Eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, but are distinguished by their shorter anagen (growing) phase.Open pubmed.ncbi.nlm.nih.gov (opens in a new tab)
Hair consists mainly of keratin, a fibrous structural protein. The human hair is formed by divisions of cells at the base of the follicle.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q10
1 · Guesser asks
Is it derived primarily from plants, including trees or algae, rather than from animals or fungi?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it derived primarily from plants, including trees or algae, rather than from animals or fungi?"}}Oracle evidence3 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 that follows the shape of the lower margin of the brow ridges of some mammals. 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)Source summary (model-reported)
Hair is a derivative of the epidermis. Externally, hair is thin, flexible tubes of dead, fully keratinized epithelial cells.
Open ovid.com (opens in a new tab)Source summary (model-reported)
Eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, but are distinguished by their shorter anagen (growing) phase. The lower portion of the hair follicle comprises the hair bulb, which is composed of rapidly proliferating matrix cells that produce the hair shaft.
Open jddonline.com (opens in a new tab) 2 · Answer check returns No
Q11
1 · Guesser asks
Is it associated primarily with vertebrate animals rather than invertebrates or fungi?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it associated primarily with vertebrate animals rather than invertebrates or fungi?"}}Oracle evidence3 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. In humans, eyebrows serve two main functions...Open en.wikipedia.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, and are wider and thicker medially.Open elementsofmorphology.nih.gov (opens in a new tab)
Vertebrate, any animal of the subphylum. The major groups of vertebrates include fishes, amphibians, reptiles, birds, and mammals.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q12
1 · Guesser asks
Is it a part of the animal's body itself rather than something the animal produces externally such as an egg, nest, or dropping?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a part of the animal's body itself rather than something the animal produces externally such as an egg, nest, or dropping?"}}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)
The line of short hairs above each eye in humans.Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q13
1 · Guesser asks
Is it present as a normal part of human anatomy?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it present as a normal part of human anatomy?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Anatomy of the Periorbital Region. 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)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)
2 · Answer check returns Yes
Q14
1 · Guesser asks
Is it normally visible on the outside of an intact living human body without dissection or imaging?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it normally visible on the outside of an intact living human body without dissection or imaging?"}}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). 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. Humans developed a smooth forehead with visible, hairy eyebrows.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns Yes
Q15
1 · Guesser asks
Is it located on the human head or neck?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located on the human head or neck?"}}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)
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 two main functions.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns Yes
Q16
1 · Guesser asks
Is it the eye as a whole or a part of the eye, including the eyeball, eyelid, eyelashes, or eyebrow?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it the eye as a whole or a part of the eye, including the eyeball, eyelid, eyelashes, or eyebrow?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The general anatomy of the non-globe periorbital region is depicted... Brow: The soft tissue at the junction of the frontalis and orbicularis oculi muscles... 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)
The line of short hairs above each eye in humans.Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns Yes
Q17
1 · Guesser asks
Is it the eyeball as a whole or a part of the eyeball itself, rather than the eyelid, eyelashes, or eyebrow?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it the eyeball as a whole or a part of the eyeball itself, rather than the eyelid, eyelashes, or eyebrow?"}}Oracle evidence1 model-reported source
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. Eyelashes: Hairs that emanate from the margins of the eyelids. Eyelid: A fold of skin and its subcutaneous components that covers the anterior globe.Open elementsofmorphology.nih.gov (opens in a new tab)
2 · Answer check returns No
Q18
1 · Guesser asks
Is it composed primarily of hair?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it composed primarily of hair?"}}Oracle evidence3 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 the hairs of its medial, middle, and lateral parts.
Open elementsofmorphology.nih.gov (opens in a new tab)The source describes eyebrows as “the strip of thick, delicate hairs following the brow ridge above the eye” and discusses their functions.Open carta.anthropogeny.org (opens in a new tab)
Source summary (model-reported)
The review concerns the biology, structure, and function of eyebrow hair and states that eyebrow hair follicles share the basic structure of hair follicles elsewhere on the body.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q19
1 · Guesser asks
Is it located above the eye on the brow ridge rather than on the eyelid margin?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located above the eye on the brow ridge rather than on the eyelid margin?"}}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. Eyelashes: Hairs that emanate from the margins of the eyelids.Open elementsofmorphology.nih.gov (opens in a new tab)
The male eyebrow sits along the supraorbital ridge.Open pubmed.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
Eyebrow
Strip of hair above the human eye
Validator rationale The proposal identifies the general anatomical eyebrow and describes its defining location and hair feature, not an isolated hair, eye, cosmetic product, or imitation.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Strip of hair above the human eye","name":"Eyebrow","question":null}} 2 · Validator returns Yes