John Venn

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Spiral Galaxy type Sa-Sb or Sa/Sb in the constellation Virgo. The majestic Sombrero Galaxy Messier 104 (M104) or NGC 4594. The team took six pictures of the galaxy, stitched them together to create the final composite image. Photo from May-June 2003

9 Britannica Articles That Explain the Meaning of Life

Aristotle (384-322 BC), Ancient Greek philosopher and scientist. One of the most influential philosophers in the history of Western thought, Aristotle established the foundations for the modern scientific method of enquiry. Statue

Philosophers to Know, Part I

Philosophers to Know, Part II

Discover

Russian grand duchess Anastasia; undated photograph. (Anastasiya Nikolayevna, Tsar Nicholas II)

Did Duchess Anastasia Survive Her Family’s Execution?

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson

Vietnam War Timeline

Nostradamus and His Prophecies

Computer mapping, woman at early 1990s computer

Timeline of the 1990s

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Vietnam War. Operation Georgia. U.S. Marines bombing bunkers and tunnels used by the Viet Cong. May 6, 1966

9 Questions About the Vietnam War Answered

John Venn: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Born	August 4, 1834 • Kingston upon Hull • England
Died	April 4, 1923 (aged 88) • Cambridge • England
Subjects Of Study	probability theory • Venn diagram • categorical proposition • syllogism

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Rudolf Carnap

German-American philosopher

Alfred North Whitehead

British mathematician and philosopher

Hans Reichenbach

American philosopher

Bertrand Russell

British logician and philosopher

Stanisław Leśniewski

Polish logician and mathematician

Willard Van Orman Quine

American philosopher

Christine Ladd-Franklin

American scientist

Ernest Nagel

American philosopher

Diodorus Cronus

Greek philosopher

John Stuart Mill

British philosopher and economist

Ludwig Wittgenstein

British philosopher

Arthur Eddington

British scientist

George Boole

British mathematician

Bernard Bosanquet

British philosopher

William Clifford, portrait replica by John Collier; in the National Portrait Gallery, London.

William Kingdon Clifford

British mathematician and philosopher

J.B.S. Haldane

British geneticist

Karl Popper

British philosopher

John Neville Keynes

British philosopher and economist

Aristotle

Greek philosopher

Hilary Putnam

American philosopher

Quiz

Agathon (centre) greeting guests in "Plato's Symposium" oil on canvas by Anselm Feuerbach, 1869; in the Staatliche Kunsthalle, Karlsruhe, Germany.

Philosophy 101

John Venn: Facts & Related Content

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