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 2

Round 2

Identified Eyebrow in 27 counted questions.

Back to all Eyebrow rounds
Questions
27
Outcome
Solved
Format errors
No errors
Duration
4m 47s
Round cost
$0.1146 All 28 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":"BKXG3AZI"}

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

3 of 25 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 man-made object?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a man-made object?"}}
Oracle evidence3 model-reported sources

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

Source 03

Source summary (model-reported)

The American Academy of Ophthalmology discusses eyebrows as human facial features and describes their biological functions, including directing moisture away from the eyes and contributing to facial expression.

Open aao.org
2 · Answer check returns No
Q2
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.

2 · Answer check returns No
Q3
1 · Guesser asks

Is it a natural non-living thing found in nature?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a natural non-living thing found in nature?"}}
Oracle evidence2 model-reported sources

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

Source 02

Source summary (model-reported)

Britannica states that, except for a few growing cells at the base of the root, hair is dead tissue composed of keratin and related proteins.

Open britannica.com
2 · Answer check returns No
Q4
1 · Guesser asks

Is it a concept or abstract idea?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a concept or abstract idea?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q5
1 · Guesser asks

Is it something that exists physically?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something that exists physically?"}}
Oracle evidence3 model-reported sources

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

2 · Answer check returns Yes
Q6
1 · Guesser asks

Is it a natural object found on Earth?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a natural object found on Earth?"}}
Oracle evidence3 model-reported sources

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

Source 03

Source summary (model-reported)

Eyebrows are an often overlooked feature of the face. ... They automatically do their job of protecting the eyes from ... dust, dirt, sweat, and rain.

Open britannica.com
2 · Answer check returns Yes
Q7
1 · Guesser asks

Is it something commonly found outdoors?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something commonly found outdoors?"}}
Oracle evidence3 model-reported sources

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

Source 02

Source summary (model-reported)

The National Recreation and Park Association reports that nearly all (96 percent) of U.S. adults spend some time outside every day; 58 percent spend more than 30 minutes a day outside.

Open nrpa.org
Source 03

Source summary (model-reported)

A review and meta-analysis estimated mean outdoor time during a summer season at 1–2 hours per day, with pooled mean estimates of 1.43 hours on weekdays and 2.38 hours on weekends.

Open pubmed.ncbi.nlm.nih.gov
2 · Answer check returns Unknown
Q8
1 · Guesser asks

Is it a type of rock or mineral?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a type of rock or mineral?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q9
1 · Guesser asks

Is it commonly found in or near water?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it commonly found in or near water?"}}
Oracle evidence2 model-reported sources

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

Source 02

Source summary (model-reported)

The eyebrow is an area of thick, short hairs above the eye. Its main function is to prevent sweat, water, and other debris from falling into the eye.

Open en.wikipedia.org
2 · Answer check returns No
Q10
1 · Guesser asks

Is it found underground?

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

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

2 · Answer check returns No
Q11
1 · Guesser asks

Is it a celestial body?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a celestial body?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No
Q12
1 · Guesser asks

Is it something that can be found in a typical household?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something that can be found in a typical household?"}}
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 a natural object commonly found in a household?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a natural object commonly found in a household?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns Unknown
Q14
1 · Guesser asks

Is it derived from a plant or animal?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it derived from a plant or animal?"}}
Oracle evidence2 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 derived from a plant?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it derived from a plant?"}}
Oracle evidence2 model-reported sources

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

Source 01

Source summary (model-reported)

The article reviews the structure and function of the hair follicle and states that eyebrow hair follicles share the same basic structure as hair follicles elsewhere on the body, differing in their shorter anagen (growing) phase.

Open pubmed.ncbi.nlm.nih.gov
Source 02

Source summary (model-reported)

The American Academy of Ophthalmology describes eyebrows as curved, delicate hairs above the human eyes and discusses their biological functions, including diverting sweat and rain away from the eyes.

Open aao.org
2 · Answer check returns No
Q16
1 · Guesser asks

Is it derived from a mammal?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it derived from a mammal?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns Yes
Q17
1 · Guesser asks

Is it a body part?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a body part?"}}
Oracle evidence3 model-reported sources

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

Source 03

Source summary (model-reported)

Dictionary.com defines eyebrow as the arch or ridge forming the upper part of the orbit of the eye, and also as the fringe of hair growing on this arch or ridge.

Open dictionary.com
2 · Answer check returns Yes
Q18
1 · Guesser asks

Is it a human body part?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a human body part?"}}
Oracle evidence3 model-reported sources

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

Source 02

Source summary (model-reported)

Merriam-Webster's medical definition describes an eyebrow as “the ridge over the eye or the hair growing usually in a line or arch on the skin over it.”

Open merriam-webster.com
Source 03

Source summary (model-reported)

Dictionary.com defines eyebrow as the arch or ridge forming the upper part of the orbit of the eye, or the fringe of hair growing on that arch or ridge.

Open dictionary.com
2 · Answer check returns Yes
Q19
1 · Guesser asks

Is it something that people commonly cut, trim, or style?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something that people commonly cut, trim, or style?"}}
Oracle evidence3 model-reported sources

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

Source 01

Source summary (model-reported)

The page gives instructions for trimming eyebrow hairs and states that trimming eyebrows is an important part of grooming used to enhance appearance and maintain them.

Open jonesroadbeauty.com
Source 02

Source summary (model-reported)

The page discusses eyebrow “styling,” eyebrow grooming services, and trimming and cutting eyebrows with tweezers, a comb, and small scissors.

Open manscaped.com
Source 03

Source summary (model-reported)

The page presents a guide to grooming eyebrows, including trimming long hairs, tweezing if needed, and finishing with styling gel.

Open byrdie.com
2 · Answer check returns Yes
Q20
1 · Guesser guesses

Fingernail

human body part that is commonly cut and maintained

Validator rationale A fingernail is a different anatomical body part from the eyebrow.

Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"human body part that is commonly cut and maintained","name":"Fingernail","question":null}}
2 · Validator returns No
Q21
1 · Guesser asks

Is it something found on the head/face?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something found on the head/face?"}}
Oracle evidence1 model-reported source

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

Source 01

Source summary (model-reported)

The page is titled “Anatomy of the Periorbital Region” under “Head and Face Terminology” and defines an eyebrow as “The arch of hair on the brow,” overlying the bony supraorbital ridge.

Open elementsofmorphology.nih.gov
2 · Answer check returns Yes
Q22
1 · Guesser asks

Is it commonly styled or groomed for appearance?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it commonly styled or groomed for appearance?"}}
Oracle evidence3 model-reported sources

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

Source 01

Source summary (model-reported)

The page describes eyebrow shaping, plucking, lamination, tinting, powder, and brow gel, and says the result is “perfectly groomed eyebrows that look fuller and more defined.”

Open glamot.com
Source 02

Source summary (model-reported)

The page says keeping eyebrows neat and well-groomed can elevate appearance and make someone look more polished. It recommends plucking stray hairs, trimming longer ones, and using styling pomade.

Open barbershop.co.nz
Source 03

Source summary (model-reported)

GQ describes eyebrow trimming as a grooming practice that can enhance the existing shape and make brows look their best, while noting that trimming need not reshape them.

Open gq.com
2 · Answer check returns Yes
Q23
1 · Guesser guesses

Hair

hair is a human body part that is commonly cut, trimmed, and styled

Validator rationale The proposal identifies hair as a broad body-part category, not the specific eyebrow feature.

Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"hair is a human body part that is commonly cut, trimmed, and styled","name":"Hair","question":null}}
2 · Validator returns No
Q24
1 · Guesser asks

Is it something removed from the body?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something removed from the body?"}}
Oracle evidence2 model-reported sources

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

Source 01

Source summary (model-reported)

Eyebrow waxing and threading are two types of hair removal options that provide long-lasting results because your hair is removed at the root. ... The process works by quickly rolling each hair between two long, twisted threads. Each hair is ripped out in a similar way to plucking.

Open healthline.com
Source 02

Source summary (model-reported)

Brow waxing is a method of removing hair from your hair follicles. ... when pulled up, it brings the hair with it from the root. Tweezing and threading are methods of removing hairs one by one.

Open byrdie.com
2 · Answer check returns No
Q25
1 · Guesser asks

Is it made up of multiple parts or sections?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it made up of multiple parts or sections?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns Yes
Q26
1 · Guesser asks

Is it something that people can see without a mirror?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something that people can see without a mirror?"}}
Oracle evidence2 model-reported sources

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

Source 02

Source summary (model-reported)

Eyebrows ... help us identify faces... eyebrows ... help us read a whole range of emotions on other people’s faces.

Open zeiss.com
2 · Answer check returns Yes
Q27
1 · Guesser asks

Is it something that can grow back after being cut or removed?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something that can grow back after being cut or removed?"}}
Oracle evidence3 model-reported sources

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

Source 02

Source summary (model-reported)

Some research suggests that it will take up to 6 months for an eyebrow to fully grow back after a person shaves it off. A small 1999 study found full eyebrow regrowth in all five participants after shaving.

Open medicalnewstoday.com
Source 03

Source summary (model-reported)

Eyebrow hair usually grows back on its own within a few months. Excessive tweezing or plucking can damage hair follicles and sometimes cause scarring, which can prevent regrowth.

Open verywellhealth.com
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted

Eyebrow

eyebrow is a human body part on the head/face that is commonly groomed and grows back

Validator rationale The proposal identifies the general human eyebrow, matching the target body feature. Its grooming and regrowth details are compatible and do not change the identity.

Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"eyebrow is a human body part on the head/face that is commonly groomed and grows back","name":"Eyebrow","question":null}}
2 · Validator returns Yes