„Testing shows the presence, not the absence of bugs“

Dijkstra (1969) J.N. Buxton and B. Randell, eds, Software Engineering Techniques, April 1970, p. 16. Report on a conference sponsored by the NATO Science Committee, Rome, Italy, 27–31 October 1969. http://homepages.cs.ncl.ac.uk/brian.randell/NATO/nato1969.PDF Possibly the earliest documented use of the famous quote.

Última atualização 22 de Maio de 2020. História
Edsger Dijkstra photo
Edsger Dijkstra3
1930 - 2002

Citações relacionadas

Edsger W. Dijkstra photo

„Program testing can be used to show the presence of bugs, but never to show their absence!“

—  Edsger W. Dijkstra Dutch computer scientist 1930 - 2002

Dijkstra (1970) " Notes On Structured Programming http://www.cs.utexas.edu/users/EWD/ewd02xx/EWD249.PDF" (EWD249), Section 3 ("On The Reliability of Mechanisms"), corollary at the end.
Variante: Program testing can be a very effective way to show the presence of bugs, but it is hopelessly inadequate for showing their absence.

James Joyce photo
Jane Addams photo
Marya Hornbacher photo

„I began to measure things in absence instead of presence.“

—  Marya Hornbacher, livro Wasted: A Memoir of Anorexia and Bulimia

Fonte: Wasted: A Memoir of Anorexia and Bulimia

Martin Luther King, Jr. photo

„True peace is not merely the absence of tension: it is the presence of justice.“

—  Martin Luther King, Jr. American clergyman, activist, and leader in the American Civil Rights Movement 1929 - 1968

In a 1955 response to an accusation that he was "disturbing the peace" by his activism during the Montgomery Bus Boycott in Montgomery, Alabama, as quoted in Let the Trumpet Sound : A Life of Martin Luther King, Jr (1982) by Stephen B. Oates

Abraham Joshua Heschel photo

„Being is both presence and absence. God had to conceal His presence in order to bring the world into being.“

—  Abraham Joshua Heschel Polish-American Conservative Judaism Rabbi 1907 - 1972

Fonte: Who Is Man? (1965), Ch. 5<!-- The sense of the ineffable, p. 90 -->
Contexto: Being is both presence and absence. God had to conceal His presence in order to bring the world into being. He had to make His absence possible in order to make room for the world's presence. Coming into being brought along denial and defiance, absence, oblivion and resistance.

Lisa Unger photo
Jodi Picoult photo
Albert Einstein photo
C. A. R. Hoare photo

„The real value of tests is not that they detect bugs in the code, but that they detect inadequacies in the methods, concentration, and skills of those who design and produce the code.“

—  C. A. R. Hoare British computer scientist 1934

How Did Software Get So Reliable Without Proof? Lecture Notes in Computer Science vol 1051 1996 pp. 1-17 : FME '96: Industrial Benefit and Advances in Formal Methods, Third International Symposium of Formal Methods Europe, Co-Sponsored by IFIP WG 14.3, Oxford, UK, March 18-22, 1996, Proceedings.

James Russell Lowell photo

„It is by presence of mind in untried emergencies that the native metal of a man is tested.“

—  James Russell Lowell American poet, critic, editor, and diplomat 1819 - 1891

Abraham Lincoln http://www.gutenberg.org/dirs/etext97/1lncn10h.htm (1864)

Pat Murphy photo
Isabel Allende photo
Ian McEwan photo
Eoin Colfer photo
Dorothy Thompson photo
Frederick Buechner photo

„Women tend to love men in their presence, while men tend to love women in their absence.“

—  Sherry Argov American writer 1977

Fonte: Why Men Marry Bitches: A Woman's Guide to Winning Her Man's Heart

„Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Etiam egestas wisi a erat. Morbi imperdiet, mauris ac auctor dictum.“