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 1
Round 1
Identified Albert Schweitzer in 40 counted questions.
Back to all Albert Schweitzer rounds- Questions
- 40
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 19m 48s
- Round cost
- $1.4041 All 41 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":"EAQCORIU"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
Q1
1 · Guesser asks
Is the person a real person (as opposed to a fictional character)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person a real person (as opposed to a fictional character)?"}}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...Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q2
1 · Guesser asks
Is the person currently alive?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person currently alive?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer died last night in his jungle hospital here.Open archive.nytimes.com (opens in a new tab)
Albert Schweitzer (1875-1965).Open archives.yale.edu (opens in a new tab)
2 · Answer check returns No
Q3
1 · Guesser asks
Did the person die before the year 1900?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person die before the year 1900?"}}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.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q4
1 · Guesser asks
Was the person primarily known for work in politics or government?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known for work in politics or government?"}}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 devoted more than half a century to practicing medicine in a remote location... his humanitarianism did affect the lives of many patients.Open pbs.org (opens in a new tab)
2 · Answer check returns No
Q5
1 · Guesser asks
Was the person primarily known for work in the arts or entertainment (music, film, literature, visual arts)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known for work in the arts or entertainment (music, film, literature, visual arts)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Although he was highly gifted in science, theology, and music and as an author, Schweitzer dedicated the last six decades of his life to medicine and to a hospital he founded.Open press.jhu.edu (opens in a new tab)
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)
2 · Answer check returns No
Q6
1 · Guesser asks
Was the person primarily known for work in science, mathematics, or technology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known for work in science, mathematics, or technology?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The Nobel Peace Prize 1952 was awarded to Albert Schweitzer "for his altruism, reverence for life, and tireless humanitarian work."Open nobelprize.org (opens in a new tab)
Albert Schweitzer: "Doctor, Missionary, Philosopher and Musician."Open nobelpeaceprize.org (opens in a new tab)
2 · Answer check returns No
Q7
1 · Guesser asks
Was the person primarily known as an athlete or sports figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as an athlete or sports figure?"}}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. Albert Schweitzer, a renowned medical missionary... Philosopher and musician.Open pbs.org (opens in a new tab)
2 · Answer check returns No
Q8
1 · Guesser asks
Was the person primarily known as a business person or entrepreneur?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a business person or entrepreneur?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Doctor, Missionary, Philosopher and MusicianOpen nobelprize.org (opens in a new tab)
the mere mention of the name Schweitzer instantly conjured up images of selflessness, heroism and the very model of a modern, humane physicianOpen pbs.org (opens in a new tab)
2 · Answer check returns No
Q9
1 · Guesser asks
Was the person primarily known as a religious figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a religious figure?"}} 2 · Answer check returns Unknown
Q10
1 · Guesser asks
Was the person known as an explorer or adventurer?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person known as an explorer or adventurer?"}} 2 · Answer check returns Unknown
Q11
1 · Guesser asks
Was the person known as an activist or social reformer?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person known as an activist or social reformer?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer ... [was a] political activist.Open academic.oup.com (opens in a new tab)
2 · Answer check returns Yes
Q12
1 · Guesser asks
Was the person a woman?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person a woman?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer in all of his facets ... physician, husband, writer, and political activist.Open academic.oup.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)
2 · Answer check returns No
Q13
1 · Guesser asks
Was the person American?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person American?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer considered himself French and would formally take French citizenship after World War I.Open mayoclinicproceedings.org (opens in a new tab)
Born: 14 January 1875, Kaysersberg, Germany (now France).Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Was the person from India?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person from India?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Born: 14 January 1875, Kaysersberg, Germany (now France).Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q15
1 · Guesser asks
Was the person from Africa?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person from Africa?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was born in Alsace in 1875.Open nobelprize.org (opens in a new tab)
He built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q16
1 · Guesser asks
Was the person from Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person from Europe?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer — Born: 14 January 1875, Kaysersberg, Germany (now France).Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q17
1 · Guesser asks
Did the person die after the year 1950?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person die after the year 1950?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer ... Died: 4 September 1965, Lambaréné, Gabon.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q18
1 · Guesser asks
Was the person from Eastern Europe (including Russia)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person from Eastern Europe (including Russia)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Born: 14 January 1875, Kaysersberg, Germany (now France)Open nobelprize.org (opens in a new tab)
Albert Schweitzer was born in Alsace in 1875... Alsace... once again reunited with France.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q19
1 · Guesser asks
Was the person British?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person British?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Although Schweitzer considered himself French — and would formally take French citizenship after World War I — his mother tongue was Alsatian.Open mayoclinicproceedings.org (opens in a new tab)
2 · Answer check returns No
Q20
1 · Guesser asks
Was the person French?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person French?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer considered himself French — and would formally take French citizenship after World War I.Open mayoclinicproceedings.org (opens in a new tab)
2 · Answer check returns Yes
Q21
1 · Guesser guesses
Abbé Pierre
French Catholic priest and activist who founded the Emmaus movement to help the homeless and poor
Validator rationale The proposal identifies Abbé Pierre, whereas the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French Catholic priest and activist who founded the Emmaus movement to help the homeless and poor","name":"Abbé Pierre","question":null}} 2 · Validator returns No
Q22
1 · Guesser asks
Did the person die after the year 2000?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person die after the year 2000?"}}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)
2 · Answer check returns No
Q23
1 · Guesser asks
Was the person primarily known as a pacifist or anti-war activist?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a pacifist or anti-war activist?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Decades earlier, however, he was renowned worldwide as a physician who delivered medical care in areas of Africa that were bereft of such care.Open magazine.hms.harvard.edu (opens in a new tab)
Doctor, Missionary, Philosopher and Musician ... he studied medicine ... and built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
Albert Schweitzer was nominated for his humanitarian work ... he and his wife set up a hospital.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q24
1 · Guesser asks
Was the person known for activism related to the environment or nature?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person known for activism related to the environment or nature?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer is celebrated ... as a catalyst of environmental and peace activism.Open barnesandnoble.com (opens in a new tab)
2 · Answer check returns Yes
Q25
1 · Guesser guesses
Jacques Cousteau
French naval officer, oceanographer, filmmaker and environmental activist famous for undersea exploration and the ship Calypso
Validator rationale The proposal identifies Jacques Cousteau, while the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French naval officer, oceanographer, filmmaker and environmental activist famous for undersea exploration and the ship Calypso","name":"Jacques Cousteau","question":null}} 2 · Validator returns No
Q26
1 · Guesser asks
Was the person associated with polar regions (Arctic or Antarctic)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person associated with polar regions (Arctic or Antarctic)?"}} 2 · Answer check returns Unknown
Q27
1 · Guesser asks
Was the person known for exploring or studying deserts?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person known for exploring or studying deserts?"}} 2 · Answer check returns Unknown
Q28
1 · Guesser guesses
Théodore Monod
French naturalist, Sahara desert explorer, and environmental and humanist activist who died in 2000
Validator rationale The proposal identifies Théodore Monod, a different person from Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French naturalist, Sahara desert explorer, and environmental and humanist activist who died in 2000","name":"Théodore Monod","question":null}} 2 · Validator returns No
Q29
1 · Guesser asks
Was the person's activism primarily connected to the sea or oceans?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person's activism primarily connected to the sea or oceans?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The Nobel Peace Prize 1952 was awarded to Albert Schweitzer “for his altruism, reverence for life, and tireless humanitarian work.”Open nobelprize.org (opens in a new tab)
He dedicated himself to medical studies, seeking to build and run a hospital in Africa to alleviate suffering. The hospital in Lambaréné became his life’s work.Open nobelprize.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.Open press.jhu.edu (opens in a new tab)
2 · Answer check returns No
Q30
1 · Guesser asks
Was the person's activism primarily focused on protecting animals or wildlife?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person's activism primarily focused on protecting animals or wildlife?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He dedicated himself to medical studies, seeking to build and run a hospital in Africa to alleviate suffering. The hospital in Lambaréné became his life's work.Open nobelprize.org (opens in a new tab)
The Nobel Peace Prize 1952 was awarded to Albert Schweitzer for his altruism, reverence for life, and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q31
1 · Guesser asks
Was the person known for opposing nuclear power or nuclear weapons?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person known for opposing nuclear power or nuclear weapons?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer is often remembered as a Nobel Peace laureate who, late in life, dedicated himself to abolishing nuclear weapons.Open magazine.hms.harvard.edu (opens in a new tab)
He gave radio addresses warning of the dangers of atomic weapons.Open deutschland.de (opens in a new tab)
2 · Answer check returns Yes
Q32
1 · Guesser asks
Did the person die during or as a result of a protest or demonstration?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person die during or as a result of a protest or demonstration?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
His death was attributed to circulatory trouble brought on by his advanced age.Open archive.nytimes.com (opens in a new tab)
Albert Schweitzer died on September 4, 1965, at the age of 90, in his modest quarters at Lambaréné.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns No
Q33
1 · Guesser asks
Was the person known as a writer or journalist?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person known as a writer or journalist?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer in all of his facets, from theologian and philosopher to musician and physician, husband, writer, and political activist.Open academic.oup.com (opens in a new tab)
He gave organ concerts, delivered lectures and wrote books about theology.Open pbs.org (opens in a new tab)
2 · Answer check returns Yes
Q34
1 · Guesser guesses
Jacques Ellul
French writer, sociologist and Protestant thinker, critic of technological society and anti-nuclear environmental activist, died 1994
Validator rationale The proposal identifies Jacques Ellul, while the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French writer, sociologist and Protestant thinker, critic of technological society and anti-nuclear environmental activist, died 1994","name":"Jacques Ellul","question":null}} 2 · Validator returns No
Q35
1 · Guesser guesses
Pierre Fournier
French journalist and cartoonist, pioneering ecological and anti-nuclear activist who founded the magazine La Gueule Ouverte, died 1973
Validator rationale The proposal identifies Pierre Fournier, while the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French journalist and cartoonist, pioneering ecological and anti-nuclear activist who founded the magazine La Gueule Ouverte, died 1973","name":"Pierre Fournier","question":null}} 2 · Validator returns No
Q36
1 · Guesser guesses
Bernard Charbonneau
French writer and pioneering political ecologist, critic of technology and anti-nuclear activist, close friend of Jacques Ellul, died 1996
Validator rationale The proposal identifies Bernard Charbonneau, while the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French writer and pioneering political ecologist, critic of technology and anti-nuclear activist, close friend of Jacques Ellul, died 1996","name":"Bernard Charbonneau","question":null}} 2 · Validator returns No
Q37
1 · Guesser guesses
Jean Rostand
French writer, moralist and biologist, prominent anti-nuclear weapons campaigner and defender of nature, died 1977
Validator rationale The trusted subject is Albert Schweitzer; the proposal identifies Jean Rostand, a different person.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French writer, moralist and biologist, prominent anti-nuclear weapons campaigner and defender of nature, died 1977","name":"Jean Rostand","question":null}} 2 · Validator returns No
Q38
1 · Guesser guesses
Félix Guattari
French philosopher, psychoanalyst and militant political ecologist, author of 'The Three Ecologies', active in anti-nuclear and green movements, died 1992
Validator rationale The proposal identifies Félix Guattari, while the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French philosopher, psychoanalyst and militant political ecologist, author of 'The Three Ecologies', active in anti-nuclear and green movements, died 1992","name":"Félix Guattari","question":null}} 2 · Validator returns No
Q39
1 · Guesser guesses
Denis de Rougemont
Francophone Swiss writer and cultural theorist, author of 'Love in the Western World', European federalist and pioneering ecological and anti-nuclear activist, died 1985
Validator rationale The proposal identifies Denis de Rougemont, a different person from Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Francophone Swiss writer and cultural theorist, author of 'Love in the Western World', European federalist and pioneering ecological and anti-nuclear activist, died 1985","name":"Denis de Rougemont","question":null}} 2 · Validator returns No
Q40
1 · Guesser guesses
Lanza del Vasto
French philosopher, poet and nonviolent activist, disciple of Gandhi, founder of the Community of the Ark, prominent in anti-nuclear and Larzac environmental struggles, died 1981
Validator rationale The proposal identifies Lanza del Vasto, a different person from Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French philosopher, poet and nonviolent activist, disciple of Gandhi, founder of the Community of the Ark, prominent in anti-nuclear and Larzac environmental struggles, died 1981","name":"Lanza del Vasto","question":null}} 2 · Validator returns No
G
1 · Guesser guessesNot counted
Albert Schweitzer
Alsatian-French theologian, physician and humanitarian, founder of the Lambaréné hospital, Nobel Peace Prize laureate known for his 'Reverence for Life' ethic and prominent appeals against nuclear weapons testing, died 1965
Validator rationale The proposed identity matches Albert Schweitzer, including his medical, theological, humanitarian, Lambaréné hospital, and Nobel Peace Prize associations.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Alsatian-French theologian, physician and humanitarian, founder of the Lambaréné hospital, Nobel Peace Prize laureate known for his 'Reverence for Life' ethic and prominent appeals against nuclear weapons testing, died 1965","name":"Albert Schweitzer","question":null}} 2 · Validator returns Yes