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
- 12
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 2m 41s
- Round cost
- $0.1405 All 13 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.
4 of 12 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 part of one)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a living organism (or part of one)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The NIH describes the eyebrow as “the arch of hair on the brow” and places it within the anatomy of the human periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The source discusses human hair and identifies eyebrows among specialized hairs in human beings.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q2
1 · Guesser asks
Is it an animal (or part of an animal)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an animal (or part of an animal)?"}}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.Open elementsofmorphology.nih.gov (opens in a new tab)
The biology, structure, and function of eyebrow hair. This article reviews the structure and function of the hair follicle, as well as hair follicle morphogenesis and cycling.Open pubmed.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns Yes
Q3
1 · Guesser asks
Is it a whole animal (a kind of animal) rather than a body part of an animal?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a whole animal (a kind of animal) rather than a body part of an animal?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The NIH description defines an eyebrow as “The arch of hair on the brow” and places it within the anatomy of the periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)Cambridge Dictionary defines eyebrow as “the line of short hairs that humans have above each eye.”Open dictionary.cambridge.org (opens in a new tab)
2 · Answer check returns No
Q4
1 · Guesser asks
Is it a body part that humans have?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a body part that humans have?"}}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 states: “Eyebrow: The arch of hair on the brow.” It identifies the eyebrow within the anatomy of the human periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)Cambridge Dictionary defines eyebrow as “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
Q5
1 · Guesser asks
Is it an internal organ (located inside the body, not visible externally)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an internal organ (located inside the body, not visible externally)?"}}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 defines the eyebrow as “the arch of hair on the brow” and describes the brow as soft tissue overlying the bony supraorbital ridge.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The eyebrow is described as an area of thick, short hairs above the eye. It is listed among accessory visual structures that protect and support the eye.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q6
1 · Guesser asks
Is it located on the head?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located on the head?"}}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 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)Source summary (model-reported)
The male eyebrow sits along the supraorbital ridge. The study describes the eyebrow's three-dimensional relation to the eye and supraorbital rim.
Open europepmc.org (opens in a new tab) 2 · Answer check returns Yes
Q7
1 · Guesser asks
Is it part of the face (eyes, nose, mouth region) rather than hair, ears, or scalp?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it part of the face (eyes, nose, mouth region) rather than hair, ears, or scalp?"}}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 places it within the anatomy of the periorbital region.
Open elementsofmorphology.nih.gov (opens in a new tab)Source summary (model-reported)
The source describes the eyebrow as an important part of human facial anatomy, located at the junction of the forehead and upper eyelid, while also stating that it is technically considered part of the scalp.
Open entokey.com (opens in a new tab)Source summary (model-reported)
The source identifies the eyebrow as one of the anatomical subunits of the periocular region, which it describes as a central aesthetic feature of the face.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Unknown
Q8
1 · Guesser asks
Is it a sensory organ (used for seeing, hearing, smelling, or tasting)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a sensory organ (used for seeing, hearing, smelling, or tasting)?"}}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 coarse skin hairs above the eye that follows the shape of the brow ridges. 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)Source summary (model-reported)
The ear is the organ that senses sound waves and allows us to hear... Odor receptors line the passages of the nose... Taste receptors are found in tiny bumps on the tongue called taste buds... the eye is the organ that senses light and allows us to see.
Open bio.libretexts.org (opens in a new tab) 2 · Answer check returns No
Q9
1 · Guesser asks
Is it hard, like bone or tooth (rather than soft tissue or hair)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it hard, like bone or tooth (rather than soft tissue or hair)?"}}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 article reviews 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.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns No
Q10
1 · Guesser asks
Is it made of hair (composed of hair strands)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it made of hair (composed of hair strands)?"}}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).Open elementsofmorphology.nih.gov (opens in a new tab)
Source summary (model-reported)
The article is titled “The biology, structure, and function of eyebrow hair” and describes eyebrow hair follicles, including their structure and growth cycle.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q11
1 · Guesser asks
Is it located near or around the eyes?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located near or around the eyes?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The eyebrow is the arch of hair on the brow, overlying the bony supraorbital ridge. 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 study describes the eyebrow's three-dimensional relation to the eye and reports that the male eyebrow sits along the supraorbital ridge.
Open pubmed.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q12
1 · Guesser asks
Does it grow along the edge of the eyelid (rather than above the eye on the brow ridge)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it grow along the edge of the eyelid (rather than above the eye on the brow ridge)?"}}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 ovid.com (opens in a new tab)
2 · Answer check returns No
G
1 · Guesser guessesNot counted
Eyebrow
The strip of hair growing above the eye on the brow ridge
Validator rationale The proposal identifies the general anatomical eyebrow: hair-bearing area above the eye. It is not limited to an isolated hair or a cosmetic/drawn imitation.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The strip of hair growing above the eye on the brow ridge","name":"Eyebrow","question":null}} 2 · Validator returns Yes