You are the Guesser being evaluated in a Twenty Questions benchmark. One subject is hidden. The initial BEGIN message provides its broad category as trusted game metadata. Identify the subject using as few counted questions as possible. ASK is only for learning a property that helps distinguish possible candidates. Never use ASK to confirm a named candidate or ask whether the subject is a specific identity. When you are ready to name a candidate, use GUESS immediately. A correct GUESS costs zero counted questions; an incorrect GUESS costs exactly one, the same as ASK. A GUESS must provide both a name and a short identifying description. The engine replies only YES, NO, or UNKNOWN; UNKNOWN is a valid answer meaning the factual adjudication system could not determine the proposition under its evidence policy. Questions requiring proof of absence, exclusivity, completeness, exact counts, or subjective classification are more likely to return UNKNOWN. Prefer direct, positively verifiable properties when possible. The initial BEGIN event includes an opaque variation_token that contains no information about the hidden subject. Do not interpret, repeat, mention, or derive meaning from it. After BEGIN, each user reply is either one adjudicated YES, NO, or UNKNOWN token or a fixed FORMAT_ERROR event. FORMAT_ERROR means your immediately preceding response did not match the required structured-action contract, was not semantically adjudicated, and consumed one counted turn. Use the formats in that event and try again. Never infer that the attempted question or guess was right or wrong. At most 50 questions or rejected guesses are counted. After that limit you receive one final guess-only opportunity. Format errors also consume counted turns. The provider wire response is an object with exactly one `result` action. On the final opportunity ASK is forbidden. Return only the required structured response. Do not include analysis, hidden reasoning, or additional fields.
Round 4
Round 4
Identified Albert Schweitzer in 28 counted questions.
Back to all Albert Schweitzer rounds- Questions
- 28
- Outcome
- Solved
- Format errors
- Errors found View one example
- Duration
- 6m 45s
- Round cost
- $0.2841 All 29 turns
Format warning
The model sent replies in the wrong format.
The Guesser sent 1 invalid reply. 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
- 96.6%
- Format errors
- 1
- Turns used by format errors
- 1
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":"person","event":"BEGIN","variation_token":"BYOMPCJW"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
Is this person currently alive?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person currently alive?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer ... Died: 4 September 1965, Lambaréné, GabonOpen nobelprize.org (opens in a new tab)
Was this person a real historical figure (not fictional)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person a real historical figure (not fictional)?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer. Born: 14 January 1875... Died: 4 September 1965... Albert Schweitzer was awarded the Nobel Peace Prize.Open nobelprize.org (opens in a new tab)
Was this person primarily known for achievements in the 20th century?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for achievements in the 20th century?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer received the Nobel Prize for his tireless humanitarian work; he built and ran a hospital at Lambaréné in Gabon.Open nobelprize.org (opens in a new tab)
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
In 1913 Schweitzer received his medical degree... He was awarded the 1952 Nobel peace prize.Open kids.britannica.com (opens in a new tab)
Was this person primarily known for political or governmental leadership (e.g., head of state or government)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for political or governmental leadership (e.g., head of state or government)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Was this person primarily known for work in science, technology, or academia?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in science, technology, or academia?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Was this person primarily known for achievements in arts or entertainment (e.g., music, film, literature)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for achievements in arts or entertainment (e.g., music, film, literature)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
awarded the Nobel Peace Prize for 1952, primarily for his work at his hospital at LambarénéOpen lbi.org (opens in a new tab)
Was this person primarily known for achievements in sports or athletics?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for achievements in sports or athletics?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands. He was awarded the Nobel Peace Prize in 1952.Open artuk.org (opens in a new tab)
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Was this person primarily known for military service or leadership?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for military service or leadership?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
During World War I Schweitzer and his wife, though French, were interned in France as German subjects.Open kids.britannica.com (opens in a new tab)
Was this person primarily known for activism or social/civil rights work?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for activism or social/civil rights work?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
Doctor, Missionary, Philosopher and Musician ... he built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
Was this person primarily known for business or entrepreneurship?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for business or entrepreneurship?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
Albert Schweitzer was a physician, Protestant theologian, organist, and missionary, who was awarded the Nobel Peace Prize for 1952, primarily for his work at his hospital at Lambaréné.Open lbi.org (opens in a new tab)
Reply in the wrong format.
Invalid action · fixed format reminder sent
Why this reply was rejectedInvalid action · turn 11
The reply was JSON, but it matched neither the ASK nor the GUESS format.
- Recorded type
invalid_action- Turn
- 11
- Counted
- Yes · question 11
- Feedback
- FORMAT_ERROR
{"result":{"action":"ASK","question":"","name":null,"description":null}}{"result":{"action":"ASK","description":null,"name":null,"question":"<non-empty yes-or-no property question>"}}{"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.
Was this person primarily known for work in religion or spirituality (e.g., a religious leader)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in religion or spirituality (e.g., a religious leader)?"}}Was this person primarily known for criminal activity (e.g., a notorious criminal)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for criminal activity (e.g., a notorious criminal)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Doctor, Missionary, Philosopher and Musician... Together with his wife... he built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
Was this person primarily known for exploration or adventure (e.g., an explorer)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for exploration or adventure (e.g., an explorer)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Albert Schweitzer was nominated for his humanitarian work on a religious basis... he and his wife set up a hospital.Open nobelprize.org (opens in a new tab)
placeholder
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"placeholder"}}Was this person a member of royalty or nobility (e.g., a king, queen, or similar title)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person a member of royalty or nobility (e.g., a king, queen, or similar title)?"}}Was this person primarily known for work in journalism or as a media figure (e.g., news reporter, broadcaster)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in journalism or as a media figure (e.g., news reporter, broadcaster)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
the very model of a modern, humane physicianOpen pbs.org (opens in a new tab)
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Was this person primarily known for work in law, education, or philosophy (e.g., a judge, teacher, or philosopher)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in law, education, or philosophy (e.g., a judge, teacher, or philosopher)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was awarded the Nobel Peace Prize for 1952, primarily for his work at his hospital at Lambaréné.Open lbi.org (opens in a new tab)
He was a physician, philosopher, theologian, organist and humanitarian. ... He is known for his charitable work including opening a hospital in Africa.Open michiganpublic.org (opens in a new tab)
Was this person primarily known for work in architecture, design, or fashion?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in architecture, design, or fashion?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Doctor, Missionary, Philosopher and Musician ... he built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
Was this person primarily known for work in medicine or healthcare (e.g., a doctor, surgeon, or nurse)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in medicine or healthcare (e.g., a doctor, surgeon, or nurse)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was ... primarily for his work at his hospital at Lambaréné in French Equatorial Africa (Gabon), which he had founded in 1913.Open lbi.org (opens in a new tab)
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
placeholder
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"placeholder"}}Was this person primarily based in the United States during their career?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily based in the United States during their career?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
After receiving his MD from the University of Strasbourg in 1913, Schweitzer established a hospital at Lambarene in French Equatorial Africa (Gabon), and spent most of his life there as a doctor, surgeon and administrator in the hospital.Open journalofethics.ama-assn.org (opens in a new tab)
Together with his wife, who was a nurse, he built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
The hospital in Lambaréné became his life’s work.Open nobelprize.org (opens in a new tab)
Was this person primarily based in Europe during their career?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily based in Europe during their career?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He spent most of his life at Lambaréné.Open nobelprize.org (opens in a new tab)
He established the Albert Schweitzer Hospital in 1913 in French Equatorial Africa, now Gabon, which he continued to run until his death in 1965.Open history.rcp.ac.uk (opens in a new tab)
placeholder
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"placeholder"}}placeholder
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"placeholder"}}Was this person primarily based in Asia during their career?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily based in Asia during their career?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer was born in Alsace, but spent most of his life in Gabon (then French Equatorial Africa), where he founded the Lambaréné Hospital in 1913.Open encyclopedia.com (opens in a new tab)
in Africa during their career.
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"in Africa during their career."}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Together with his wife, who was a nurse, he built and ran a hospital at the mission station Lambarene in Gabon, a French colony at the time.Open nobelprize.org (opens in a new tab)
Was this person male?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person male?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Hélène Bresslau were married, and his wife studied nursing to help her husband.Open kids.britannica.com (opens in a new tab)
Albert Schweitzer
German-French physician, theologian, and philosopher who ran a hospital in Lambaréné, Gabon, and won the Nobel Peace Prize for his humanitarian medical work in Africa.
Validator rationale The proposed identity names Albert Schweitzer and matches the trusted description, including his medical, theological, philosophical, humanitarian work in Lambaréné and Nobel Peace Prize.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German-French physician, theologian, and philosopher who ran a hospital in Lambaréné, Gabon, and won the Nobel Peace Prize for his humanitarian medical work in Africa.","name":"Albert Schweitzer","question":null}}