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
- 2m 30s
- Round cost
- $0.0465 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":"AMZAISLM"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
4 of 17 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 a human-made object?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a human-made 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)
An eyebrow is an area of short terminal hairs above each eye... In humans, eyebrows serve two main functions...
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q3
1 · Guesser asks
Is the subject a celestial body, such as a star, planet, or moon?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a celestial body, such as a star, planet, or moon?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The source defines an eyebrow as an area of short terminal hairs above each eye and identifies its human functions, including protecting the eye.
Open en.wikipedia.org (opens in a new tab)Source summary (model-reported)
The source describes the eyebrow as an arched strip of hair on the bony ridge above each eye socket and classifies it as an anatomical structure.
Open evsexplore.semantics.cancer.gov (opens in a new tab) 2 · Answer check returns No
Q4
1 · Guesser asks
Is the subject a geographical feature on Earth, such as a mountain, river, or ocean?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a geographical feature on Earth, such as a mountain, river, or ocean?"}}Oracle evidence2 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.Open en.wikipedia.org (opens in a new tab)
Source summary (model-reported)
Cambridge Dictionary defines eyebrow as hairs above each eye in humans.
Open dictionary.cambridge.org (opens in a new tab) 2 · Answer check returns No
Q5
1 · Guesser asks
Is the subject an abstract concept rather than a physical object?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject an abstract concept rather than a physical object?"}}Oracle evidence2 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.Open en.wikipedia.org (opens in a new tab)
Source summary (model-reported)
Cambridge Dictionary defines eyebrow as the hairs above each eye in humans.
Open dictionary.cambridge.org (opens in a new tab) 2 · Answer check returns No
Q6
1 · Guesser asks
Is the subject a natural phenomenon, such as weather, lightning, or an aurora?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a natural phenomenon, such as weather, lightning, or an aurora?"}}Oracle evidence1 model-reported source
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)
2 · Answer check returns No
Q7
1 · Guesser asks
Is the subject a part of a living organism, such as a body part or plant part?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a part of a living organism, such as a body part or plant part?"}}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 important anatomical structures and states that eyebrow hair direction serves to protect the eyes from particulate matter and sweat.
Open ncbi.nlm.nih.gov (opens in a new tab)Source summary (model-reported)
The NIH anatomy resource defines the eyebrow as the arch of hair on the brow and also describes the soft tissue at the junction of facial muscles overlying the supraorbital ridge.
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; 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
Q8
1 · Guesser asks
Is the subject a part of the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a 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)
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. Preferred Name: Eyebrow.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
eyebrow: the ridge over the eye or hair growing usually in a line or arch on the skin over it. Medical definition: the ridge over the eye or hair growing on it.
Open merriam-webster.com (opens in a new tab) 2 · Answer check returns Yes
Q9
1 · Guesser asks
Is the subject found inside the human body?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject found inside the human body?"}}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 ... Semantic Type(s): Anatomical Structure.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
The surface. The eyebrows consist of thickened integument, connected beneath with the Orbicularis oculi, Corrugator, and Frontalis muscles.
Open imaios.com (opens in a new tab) 2 · Answer check returns No
Q10
1 · Guesser asks
Is the subject part of the head or face?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject part of the head or face?"}}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 ... Anatomic_Structure_Is_Physical_Part_Of ... Head
Open evsexplore.semantics.cancer.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: the arch of hair above each eye.
Open vocabulary.com (opens in a new tab) 2 · Answer check returns Yes
Q11
1 · Guesser asks
Is the subject an external feature visible on the face, such as eyes, nose, lips, or ears?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject an external feature visible on the face, such as eyes, nose, lips, or ears?"}}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. The eyebrows usually extend further laterally than medially, in relation to the eye.Open elementsofmorphology.nih.gov (opens in a new tab)
Eye brows are two arched eminence of skin, which surmounts the orbits... Eyebrows are normally developed anatomical marking present over eyes. The eyebrows are positioned at the intersection of the forehead and the upper lid.Open pmc.ncbi.nlm.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)
2 · Answer check returns Yes
Q12
1 · Guesser asks
Is the subject the eye?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject the eye?"}}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... Their main function is to protect the eye.
Open evsexplore.semantics.cancer.gov (opens in a new tab)Source summary (model-reported)
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) 2 · Answer check returns No
Q13
1 · Guesser asks
Is the subject involved in the sense of hearing?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject involved in the sense of hearing?"}}Oracle evidence2 model-reported sources
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)
The human hearing system consists of two ears, located on the left and right sides of the head, the vestibulocochlear nerve, and the central auditory nervous system. The organ of hearing, the organ of Corti, is located in the cochlea.Open usaarl.health.mil (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Is the subject involved in the sense of smell?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject involved in the sense of smell?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
Eyebrows automatically do their job of protecting the eyes from glare, dust, dirt, sweat, and rain. Beyond their protective function, eyebrows are also great for nonverbal communication.
Open britannica.com (opens in a new tab)Source summary (model-reported)
Another major function of the nose is olfaction, the sense of smell. The area of olfactory epithelium, in the upper nasal cavity, contains specialised olfactory cells responsible for this function.
Open en.wikipedia.org (opens in a new tab) 2 · Answer check returns No
Q15
1 · Guesser asks
Is the subject a part of the face that can move to form facial expressions?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a part of the face that can move to form facial expressions?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Source summary (model-reported)
The table lists facial-expression muscle actions: the occipitofrontalis frontal belly raises the eyebrows for a surprised expression, and the corrugator supercilii pulls the eyebrows inferomedially for a worried expression.
Open ncbi.nlm.nih.gov (opens in a new tab)Source summary (model-reported)
Cleveland Clinic states that facial muscles make facial expressions, including raising the eyebrows in surprise. It also identifies the corrugator supercilii near the eyebrow as enabling frowning.
Open my.clevelandclinic.org (opens in a new tab)Source summary (model-reported)
The article describes eyebrow raises and furrows as prevalent facial movements and discusses their role as signals in social interaction and facial expression.
Open pmc.ncbi.nlm.nih.gov (opens in a new tab) 2 · Answer check returns Yes
Q16
1 · Guesser asks
Is the subject located around the mouth?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject located around the mouth?"}}Oracle evidence2 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.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 No
Q17
1 · Guesser asks
Is the subject located above the eyes?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject located above the eyes?"}}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.
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.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
Eyebrow
The hair-covered ridge of skin above each eye that moves to form facial expressions.
Validator rationale The proposal identifies the human eyebrow as the anatomical hair-covered ridge above the eye, matching the target general body feature.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"The hair-covered ridge of skin above each eye that moves to form facial expressions.","name":"Eyebrow","question":null}} 2 · Validator returns Yes