Deep20Bench
v1.1Current

Benchmark edition

Edition 1.1 settings

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

Round 2

Round 2

Identified Eyebrow in 19 counted questions.

Back to all Eyebrow rounds
Questions
19
Outcome
Solved
Format errors
Errors found View one example
Duration
4m 19s
Round cost
$0.1599 All 20 turns

Format warning

The model sent replies in the wrong format.

The Guesser sent 2 invalid replies. Each one before the question limit used up a counted turn. The model was only reminded of the required format; it was never told whether its question or guess was correct.

Valid format
90.0%
Format errors
2
Turns used by format errors
2

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.

Q1
1 · Guesser asks

Is it a living thing (such as an animal or plant)?

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

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

Source 02
At the base of the follicle is the bulb—the living portion of hair. ... When cells at the base of the hair follicle die, they leave behind a tough protein called keratin. ... People often refer to hair as being dead. This is true of the strands of hair you can style and touch.
Open askthescientists.com
2 · Answer check returns No
Q2
1 · Guesser asks

Is it a human-made object (manufactured or constructed by people)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a human-made object (manufactured or constructed by people)?"}}
Oracle evidence3 model-reported sources

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

Source 02
The area of curved, delicate hairs above our eyes are believed to channel unwanted moisture—sweat and rain in particular—away from the eye... They also help to block out light and filter dust and dirt.
Open aao.org
2 · Answer check returns No
Q3
1 · Guesser asks

Is it a physical, tangible thing (as opposed to an abstract concept or phenomenon)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a physical, tangible thing (as opposed to an abstract concept or phenomenon)?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns Yes
Q4
1 · Guesser reply rejectedTurn counted

Reply in the wrong format.

Invalid action · fixed format reminder sent

Why this reply was rejectedInvalid action · turn 4

The reply was JSON, but it matched neither the ASK nor the GUESS format.

Recorded type
invalid_action
Turn
4
Counted
Yes · question 4
Feedback
FORMAT_ERROR
What the model returnedExact text from the provider
Attempt 1 · finish stop
{"result":{"action":"ASK","question":"","name":null,"description":null}}
What a valid reply looks likeThe same formats shown to the Guesser
ASK
{"result":{"action":"ASK","description":null,"name":null,"question":"<non-empty yes-or-no property question>"}}
GUESS
{"result":{"action":"GUESS","description":"<non-empty identifying description>","name":"<non-empty candidate name>","question":null}}

A reply must match one of these formats exactly. Text fields in use must not be empty; unused fields must be JSON null.

2 · System responseFORMAT
Q5
1 · Guesser asks

Is it something found in outer space (a celestial body or part of one)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it something found in outer space (a celestial body or part of one)?"}}
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 naturally occurring substance or material (such as a rock, mineral, or liquid)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a naturally occurring substance or material (such as a rock, mineral, or liquid)?"}}
Oracle evidence3 model-reported sources

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

2 · Answer check returns No
Q7
1 · Guesser asks

Is it a geographical feature (such as a mountain, river, cave, or desert)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a geographical feature (such as a mountain, river, cave, or desert)?"}}
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 a body part of a living organism?

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

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

2 · Answer check returns Yes
Q9
1 · Guesser asks

Is it a body part found in humans?

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

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

2 · Answer check returns Yes
Q10
1 · Guesser asks

Is it an internal organ (located inside the body)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it an internal organ (located inside the body)?"}}
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 located on the head or face?

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

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

2 · Answer check returns Yes
Q12
1 · Guesser asks

Is it a sensory organ (such as an eye, ear, or nose)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a sensory organ (such as an eye, ear, or nose)?"}}
Oracle evidence3 model-reported sources

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

Source 01
The eyebrow is an area of coarse skin hairs above the eye... The main function of the eyebrows is to prevent moisture, mostly salty sweat and rain, from flowing into the eye... Eyebrows also prevent debris... from falling into the eyes.
Open wikidoc.org
Source 02
The Eyebrows (supercilia) are two arched eminences of integument, which surmount the upper circumference of the orbits, and support numerous short, thick hairs... Sense organs > Visual organ > Accessory visual structures > Eyebrow.
Open imaios.com
Source 03
The accessory visual structures... are the protecting and supporting structures (adnexa) of the eye, including the eyebrow, eyelids, and lacrimal apparatus. The main function of the eyebrow is to prevent sweat, water, and other debris falling into the eye.
Open en.wikipedia.org
2 · Answer check returns No
Q13
1 · Guesser asks

Is it composed of hair?

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

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

2 · Answer check returns Yes
Q14
1 · Guesser asks

x

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"x"}}
2 · Answer check returns Unknown
Q15
1 · Guesser reply rejectedTurn counted

Reply in the wrong format.

Invalid action · fixed format reminder sent

Why this reply was rejectedInvalid action · turn 15

The reply was JSON, but it matched neither the ASK nor the GUESS format.

Recorded type
invalid_action
Turn
15
Counted
Yes · question 15
Feedback
FORMAT_ERROR
What the model returnedExact text from the provider
Attempt 1 · finish stop
{"result":{"action":"ASK","question":"","name":null,"description":null}}
What a valid reply looks likeThe same formats shown to the Guesser
ASK
{"result":{"action":"ASK","description":null,"name":null,"question":"<non-empty yes-or-no property question>"}}
GUESS
{"result":{"action":"GUESS","description":"<non-empty identifying description>","name":"<non-empty candidate name>","question":null}}

A reply must match one of these formats exactly. Text fields in use must not be empty; unused fields must be JSON null.

2 · System responseFORMAT
Q16
1 · Guesser asks

Is it typically present only on adult males?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it typically present only on adult males?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No
Q17
1 · Guesser asks

Is it located directly around or on the eye?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located directly around or on the eye?"}}
Oracle evidence3 model-reported sources

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

2 · Answer check returns Rather yes
Q18
1 · Guesser asks

Does it grow from the edge of the eyelid?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it grow from the edge of the eyelid?"}}
Oracle evidence2 model-reported sources

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

Source 01
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
2 · Answer check returns No
Q19
1 · Guesser asks

x

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"x"}}
Oracle evidence1 model-reported source

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

Source 01
A yes–no question is a question whose expected answer is one of two choices, typically "yes" or "no". "x" alone does not state such a question or identify a claim about the subject.
Open en.wikipedia.org
2 · Answer check returns Unknown
G
1 · Guesser guessesNot counted

Eyebrow

The strip of hair above the human eye

Validator rationale The proposal identifies the general anatomical kind—an eyebrow—and describes its defining location and hair feature. It does not substitute an isolated hair, eye, cosmetic product, or imitation.

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