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 2
Round 2
Identified Albert Schweitzer in 30 counted questions.
Back to all Albert Schweitzer rounds- Questions
- 30
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 8m 33s
- Round cost
- $0.3393 All 31 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":"person","event":"BEGIN","variation_token":"BKXG3AZI"}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)
question
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"question"}}Was this person primarily known for achievements in politics or government leadership?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for achievements in politics or government leadership?"}}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)
Schweitzer contributed significantly to the field of medicine and theology during his lifetime.Open history.rcp.ac.uk (opens in a new tab)
Was this person primarily known for achievements in the arts, such as music, literature, or visual art?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for achievements in the arts, such as music, literature, or visual art?"}}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 achievements in science, mathematics, or technology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for achievements in science, mathematics, or technology?"}}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 nominated for his humanitarian work on a religious basis.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 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.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 achievements or leadership?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for military achievements or leadership?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer received his Nobel Prize for tireless humanitarian work; he was a doctor, missionary, philosopher and musician who built and ran a hospital in Gabon.Open nobelprize.org (opens in a new tab)
Albert Schweitzer was nominated for his humanitarian work; he entered medical school to qualify as a mission doctor and set up a hospital at Lambaréné.Open nobelprize.org (opens in a new tab)
Was this person primarily known for religious or spiritual leadership?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for religious or spiritual leadership?"}}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)
Dr. Schweitzer became a major theologian, but he was renowned as a medical missionary and humanitarian who founded and ran a hospital in Africa.Open pbs.org (opens in a new tab)
Was this person primarily known for achievements in business or entrepreneurship?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for achievements in business or entrepreneurship?"}}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 peaceprizelaureates.nobelpeacecenter.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 known primarily for criminal activity or infamy rather than a conventional profession?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person known primarily for criminal activity or infamy rather than a conventional profession?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Profession: Doctor of Philosophy, Theology and Medicine. Musician and missionary... he and his wife set up a hospital.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)
Was this person primarily known for work in entertainment or media, such as acting, film, or television?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in entertainment or media, such as acting, film, or television?"}}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)
Alsatian theologian, philosopher & physicianOpen britannica.com (opens in a new tab)
Was this person primarily known for exploration or discovery (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 discovery (e.g., an explorer)?"}}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: a life of two halves... Schweitzer contributed significantly to the field of medicine and theology... he was also an esteemed organist and musician.Open history.rcp.ac.uk (opens in a new tab)
Was this person primarily known as a philosopher, scholar, or academic thinker?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a philosopher, scholar, or academic thinker?"}}Was this person primarily known for social activism or civil rights work?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for social activism or civil rights work?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Doctor, Missionary, Philosopher and Musician; 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)
Dr. Schweitzer was a physician, philosopher, theologian, organist and humanitarian, known for his charitable work including opening a hospital in Africa.Open interlochenpublicradio.org (opens in a new tab)
Did this person live before the year 1500 AD?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person live before the year 1500 AD?"}}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 1965Open nobelprize.org (opens in a new tab)
Was this person known primarily for royalty or noble status (e.g., king, queen, prince, princess)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person known primarily for royalty or noble status (e.g., king, queen, prince, princess)?"}}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)
Dr. Schweitzer was a physician, philosopher, theologian, organist and humanitarian... known for his charitable work including opening a hospital in Africa.Open interlochenpublicradio.org (opens in a new tab)
Was this person primarily known for work in medicine or healthcare?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in medicine or healthcare?"}}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)
The most famous medical missionary, undoubtedly, was Albert Schweitzer.Open journalofethics.ama-assn.org (opens in a new tab)
placeholder
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"placeholder"}}Was this person female?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person female?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer (1875–1965) was an Alsatian theologian, musician, philosopher, physician, and medical missionary. He was born in Kaysersberg.Open theopedia.com (opens in a new tab)
In 1912 he and Hélène Bresslau were married, and his wife studied nursing to help her husband.Open kids.britannica.com (opens in a new tab)
Was this person primarily known for a specific medical discovery or breakthrough (such as a vaccine, treatment, or medical technique)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for a specific medical discovery or breakthrough (such as a vaccine, treatment, or medical technique)?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer received his Nobel Prize for tireless humanitarian work; he built and ran a hospital at Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
Dr. Schweitzer founded a hospital in Lambaréné and won the Nobel Peace Prize in 1952.Open pbs.org (opens in a new tab)
Schweitzer was a physician, philosopher, theologian, organist and humanitarian, known for charitable work including opening a hospital in Africa.Open interlochenpublicradio.org (opens in a new tab)
Was this person primarily known as a physician or surgeon who treated patients in clinical practice (rather than a researcher)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a physician or surgeon who treated patients in clinical practice (rather than a researcher)?"}}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)
He studied medicine. 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)
Did this person live and practice medicine primarily in the 20th or 21st century?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person live and practice medicine primarily in the 20th or 21st century?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Born: 14 January 1875... Died: 4 September 1965, Lambaréné, GabonOpen nobelprize.org (opens in a new tab)
Lambaréné, a hospital and medical mission, was founded and built in 1913 by Dr Schweitzer and his wife Helene.Open nobelprize.org (opens in a new tab)
Was this person primarily based in the United States?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily based in the United States?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The hospital in Lambaréné became his life’s work.Open nobelprize.org (opens in a new tab)
He visited the United States in 1949 to speak in Aspen, Colo.Open kids.britannica.com (opens in a new tab)
Albert Schweitzer died on September 4, 1965, and was buried at Lambaréné.Open nobelprize.org (opens in a new tab)
Was this person primarily based in Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily based in Europe?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Returning to Lambaréné in 1924, where he remained until his death.Open giffordlectures.org (opens in a new tab)
Schweitzer dedicated the last six decades of his life to medicine and to a hospital he founded in French Equatorial Africa, the Albert Schweitzer Hospital in Lambaréné, Gabon.Open press.jhu.edu (opens in a new tab)
Was this person primarily based in Asia?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily based in Asia?"}}Oracle evidence2 model-reported sources
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)
Residence at the time of the award: France; Died: Lambaréné, Gabon.Open nobelprize.org (opens in a new tab)
Was this person primarily based in Africa?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily based in Africa?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
Was this person primarily known for performing or pioneering a specific surgical technique, such as an organ transplant?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for performing or pioneering a specific surgical technique, such as an organ transplant?"}}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)
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)
Was this person primarily known for humanitarian medical work, such as running a hospital or clinic for underserved populations?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for humanitarian medical work, such as running a hospital or clinic for underserved populations?"}}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)
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)
Albert Schweitzer
French-German physician, theologian, and philosopher who founded and ran a hospital in Lambaréné, Gabon, providing medical care to Africans in the 20th century.
Validator rationale The proposed identity exactly matches Albert Schweitzer, including his medical, theological, philosophical work and hospital in Lambaréné.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French-German physician, theologian, and philosopher who founded and ran a hospital in Lambaréné, Gabon, providing medical care to Africans in the 20th century.","name":"Albert Schweitzer","question":null}}