Deep20Bench
v1.1Current

Benchmark edition

Edition 1.1 settings

10 subjects3 rounds per subject40 question limit
Question answersYesRather yesRather noNoUnknown
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Round

Round 1

Round 1

Identified Eyebrow in 17 counted questions.

Back to all Eyebrow rounds
Questions
17
Outcome
Solved
Format errors
No errors
Duration
5m 16s
Round cost
$0.0556 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.

System message
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.
BEGIN event
{"category":"thing","event":"BEGIN","variation_token":"EAQCORIU"}

Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.

2 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 it primarily something made or manufactured by humans?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it primarily something made or manufactured by humans?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02

Source summary (model-reported)

The area of curved, delicate hairs above our eyes are believed to channel unwanted moisture—sweat and rain in particular—away from the eye... We wax, tweeze and even dye them.

Open aao.org
Source 03

Source summary (model-reported)

Eyebrows are described as strips of thick, delicate hairs following the brow ridge above the eye. The source discusses their biological functions, including blocking sweat and contributing to emotional expression.

Open carta.anthropogeny.org
2 · Answer check returns No
Q2
1 · Guesser asks

Is it a living organism (an animal, plant, fungus, or microbe)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a living organism (an animal, plant, fungus, or microbe)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. ... The external hair is completely dead and composed entirely of keratin. Hair of the eyebrows prevents sweat and other particles from dripping into and bothering the eyes.
Open openstax.org
2 · Answer check returns No
Q3
1 · Guesser asks

Is it a tangible physical entity rather than an abstract concept, process, or phenomenon?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a tangible physical entity rather than an abstract concept, process, or phenomenon?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes
Q4
1 · Guesser asks

Is it a celestial object or part of one located outside Earth, such as a planet, star, moon, or asteroid?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a celestial object or part of one located outside Earth, such as a planet, star, moon, or asteroid?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01

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: prevention of sweat, water, and other debris from falling into the eye socket, and communication through facial expression.

Open en.wikipedia.org
2 · Answer check returns No
Q5
1 · Guesser asks

Is it a large-scale natural geographic feature such as a mountain, valley, river, lake, ocean, desert, island, or cave?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a large-scale natural geographic feature such as a mountain, valley, river, lake, ocean, desert, island, or cave?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q6
1 · Guesser asks

Is it a bulk substance or material (like water, rock, air, soil) rather than a discrete structured object with a defined shape?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a bulk substance or material (like water, rock, air, soil) rather than a discrete structured object with a defined shape?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01

Source summary (model-reported)

Eyebrow: The arch of hair on the brow. The eyebrow is sometimes referred to as the supercilium. The eyebrow can be divided into medial, middle (central), and lateral parts, with hairs oriented differently in these areas.

Open elementsofmorphology.nih.gov
Source 03

Source summary (model-reported)

The study describes the topographic anatomy and three-dimensional relation of the eyebrow, including measurements of its position and borders. It concludes that the eyebrow has a flat contour and should be understood as a three-dimensional construct.

Open pubmed.ncbi.nlm.nih.gov
2 · Answer check returns No
Q7
1 · Guesser asks

Is it a geological object such as a rock, mineral, crystal, gemstone, or fossil?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a geological object such as a rock, mineral, crystal, gemstone, or fossil?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q8
1 · Guesser asks

Is it derived from or part of a living organism, such as a body part, shell, bone, wood, fruit, or other biological product?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it derived from or part of a living organism, such as a body part, shell, bone, wood, fruit, or other biological product?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01

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...

Open en.wikipedia.org
2 · Answer check returns Yes
Q9
1 · Guesser asks

Is it part of or produced by an animal, including a human, rather than by a plant or fungus?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it part of or produced by an animal, including a human, rather than by a plant or fungus?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02

Source summary (model-reported)

Eyebrows, the strip of thick, delicate hairs following the brow ridge above the eye ... humans have little facial hair coverage, which makes the strip of hair on the brow ridge remarkable.

Open carta.anthropogeny.org
2 · Answer check returns Yes
Q10
1 · Guesser asks

Is it normally a part or product of the human body?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it normally a part or product of the human body?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01
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
2 · Answer check returns Yes
Q11
1 · Guesser asks

Is it an internal anatomical structure that is not normally visible from outside the intact body?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an internal anatomical structure that is not normally visible from outside the intact body?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q12
1 · Guesser asks

Is it located on the head, face, or neck?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located on the head, face, or neck?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes
Q13
1 · Guesser asks

Is it an anatomical body part or structure rather than a secretion or excreted substance like tears, saliva, or wax?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an anatomical body part or structure rather than a secretion or excreted substance like tears, saliva, or wax?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes
Q14
1 · Guesser asks

Does a typical human normally have two of them, one on each side of the body?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does a typical human normally have two of them, one on each side of the body?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes
Q15
1 · Guesser asks

Is it primarily a sense organ involved in vision, hearing, smell, or taste?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it primarily a sense organ involved in vision, hearing, smell, or taste?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01
An eyebrow is an area of short terminal hairs above each eye. 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
2 · Answer check returns No
Q16
1 · Guesser asks

Is it primarily composed of hair?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it primarily composed of hair?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02

Source summary (model-reported)

The PubMed-listed review concerns the biology, structure, and function of eyebrow hair and identifies eyebrow hair follicles as sharing the basic structure of hair follicles elsewhere on the body.

Open pubmed.ncbi.nlm.nih.gov
2 · Answer check returns Yes
Q17
1 · Guesser asks

Is it located above the eyes?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located above the eyes?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes
G
1 · Guesser guessesNot counted

Eyebrow

strip of hair above each human eye

Validator rationale The proposal identifies the general human eyebrow as the strip of hair above the eye, matching the target body feature rather than an isolated hair or related object.

Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"strip of hair above each human eye","name":"Eyebrow","question":null}}
2 · Validator returns Yes