Joseph Weizenbaum: German-American computer scientist (1923 - 2008) | Biography, Filmography, Facts, Information, Career, Wiki, Life
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Joseph Weizenbaum
German-American computer scientist

Joseph Weizenbaum

Joseph Weizenbaum
The basics

Quick Facts

Intro German-American computer scientist
A.K.A. Joe Weizenbaum
Was Computer scientist Writer Non-fiction writer Professor Educator Artificial intelligence researcher
From Germany United States of America
Field Academia Literature Technology Science
Gender male
Birth 8 January 1923, Berlin, Margraviate of Brandenburg
Death 5 March 2008, Ludwigsfelde, Germany (aged 85 years)
Star sign Capricorn
Siblings: Henry F. Sherwood
The details (from wikipedia)


Joseph Weizenbaum (8 January 1923 – 5 March 2008) was a German American computer scientist and a professor at MIT. The Weizenbaum Award is named after him. He is considered one of the fathers of modern artificial intelligence.

Life and career

Born in Berlin, Germany to Jewish parents, he escaped Nazi Germany in January 1936, emigrating with his family to the United States. He started studying mathematics in 1941 at Wayne State University, in Detroit, Michigan. In 1942, he interrupted his studies to serve in the U.S. Army Air Corps as a meteorologist, having been turned down for cryptology work because of his "enemy alien" status. After the war, in 1946, he returned to Wayne State, obtaining his B.S. in Mathematics in 1948, and his M.S. in 1950.

Around 1952, as a research assistant at Wayne, Weizenbaum worked on analog computers and helped create a digital computer. In 1956 he worked for General Electric on ERMA, a computer system that introduced the use of the magnetically encoded fonts imprinted on the bottom border of checks, allowing automated check processing via Magnetic Ink Character Recognition (MICR).

In 1964 he took a position at MIT.

Psychology simulation at MIT

In 1966, he published a comparatively simple program called ELIZA, named after the ingenue in George Bernard Shaw's Pygmalion, which performed natural language processing. Driven by a script named DOCTOR, it was capable of engaging humans in a conversation which bore a striking resemblance to one with an empathic psychologist. Weizenbaum modeled its conversational style after Carl Rogers, who introduced the use of open-ended questions to encourage patients to communicate more effectively with therapists. The program applied pattern matching rules to statements to figure out its replies. (Programs like this are now called chatbots.) It is considered the forerunner of thinking machines. Weizenbaum was shocked that his program was taken seriously by many users, who would open their hearts to it. Famously, when observing his secretary using the software - who was aware that it was a simulation - she asked Weizenbaum: "would you mind leaving the room please?".

Apprehensions about Artificial Intelligence

He started to think philosophically about the implications of artificial intelligence and later became one of its leading critics. In an interview with MIT's The Tech, Weizenbaum elaborated on his fears, expanding them beyond the realm of mere artificial intelligence, explaining that his fears for society and the future of society were largely because of the computer itself. His belief was that the computer, at its most base level, is a fundamentally conservative force and that despite being a technological innovation, it would end up hindering social progress. Weizenbaum used his experience working with Bank of America as justification for his reasoning, saying that the computer allowed banks to deal with an ever-expanding number of checks in play that otherwise would have forced drastic changes to banking organization such as decentralization. As such, although the computer allowed the industry to become more efficient, it prevented a fundamental re-haul of the system.

Despite working so closely with computers for many years, Weizenbaum frequently worried about the negative effects they would have on the world, particularly with regards to the military, calling the computer "a child of the military." When asked about the belief that a computer science professional would more often than not end up working with defense, Weizenbaum detailed his position on rhetoric, specifically euphemism, with regards to its effect on societal viewpoints. He believed that the terms "the military" and "defense" did not accurately represent the organizations and their actions. He made it clear that he did not think of himself as a pacifist, believing that there are certainly times where arms are necessary, but by referring to defense as killings and bombings, humanity as a whole would be less inclined to embrace violent reactions so quickly.

Difference between Deciding and Choosing

His influential 1976 book Computer Power and Human Reason displays his ambivalence towards computer technology and lays out his case: while Artificial Intelligence may be possible, we should never allow computers to make important decisions because computers will always lack human qualities such as compassion and wisdom. Weizenbaum makes the crucial distinction between deciding and choosing. Deciding is a computational activity, something that can ultimately be programmed. Choice, however, is the product of judgment, not calculation. It is the capacity to choose that ultimately makes us human. Comprehensive human judgment is able to include non-mathematical factors, such as emotions. Judgment can compare apples and oranges, and can do so without quantifying each fruit type and then reductively quantifying each to factors necessary for comparison.

Weizenbaum was the creator of the SLIP programming language.

Returning to roots

In 1996, Weizenbaum moved to Berlin and lived in the vicinity of his childhood neighborhood.

A German documentary film on Weizenbaum, "Weizenbaum. Rebel at Work.", was released in 2007 and later dubbed in English. The documentary film Plug & Pray on Weizenbaum and the ethics of artificial intelligence was released in 2010.

Until his death he was Chairman of the Scientific Council at the Institute of Electronic Business in Berlin. In addition to working at MIT, Weizenbaum held academic appointments at Harvard, Stanford, the University of Bremen, and other universities.

Weizenbaum was buried at the Weißensee Jewish cemetery in Berlin. A memorial service was held in Berlin on 18 March 2008.


  • "ELIZA — A Computer Program for the Study of Natural Language Communication between Man and Machine," Communications of the Association for Computing Machinery 9 (1966): 36-45.
  • Computer Power and Human Reason: From Judgment To Calculation, San Francisco: W. H. Freeman, 1976 ISBN 0-7167-0464-1
  • Islands in the Cyberstream: Seeking Havens of Reason in a Programmed Society, Sacramento: Litwin Books, 2015 ISBN 978-1-63400-000-0
The contents of this page are sourced from Wikipedia article on 09 Mar 2020. The contents are available under the CC BY-SA 4.0 license.
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