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


Edsger Dijkstra

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EDSGER DIJKSTRA I mentioned the non-competitive spirit explicitly, because these days, excellence is a fashionable c...
EDSGER DIJKSTRA Teaching to unsuspecting youngsters the effective use of formal methods is one of the joys of life b...
EDSGER DIJKSTRA APL is a mistake, carried through to perfection. It is the language of the future for the programmin...
EDSGER DIJKSTRA Many mathematicians derive part of their self-esteem by feeling themselves the proud heirs of a long...
EDSGER DIJKSTRA The lurking suspicion that something could be simplified is the world's richest source of reward...
EDSGER DIJKSTRA The use of COBOL cripples the mind; its teaching should, therefore, be regarded as a criminal offens...
EDSGER DIJKSTRA The ability of discerning high quality unavoidably implies the ability of identifying shortcomings.
EDSGER DIJKSTRA Perfecting oneself is as much unlearning as it is learning.
EDSGER DIJKSTRA Programming is one of the most difficult branches of applied mathematics; the poorer mathematicians ...
EDSGER DIJKSTRA About the use of language: it is impossible to sharpen a pencil with a blunt axe. It is equally vain...
EDSGER DIJKSTRA The question of whether a computer can think is no more interesting than the question of whether a s...
EDSGER DIJKSTRA Don't compete with me: firstly, I have more experience, and secondly, I have chosen the weapons.
EDSGER DIJKSTRA If 10 years from now, when you are doing something quick and dirty, you suddenly visualize that I am...
EDSGER DIJKSTRA Why has elegance found so little following? That is the reality of it. Elegance has the disadvantage...
EDSGER DIJKSTRA Mathematicians are like managers - they want improvement without change.
EDSGER DIJKSTRA It is practically impossible to teach good programming to students that have had a prior exposure to...
EDSGER DIJKSTRA There should be no such thing as boring mathematics.
EDSGER DIJKSTRA Computer science is no more about computers than astronomy is about telescopes.
EDSGER DIJKSTRA Elegance is not a dispensable luxury but a factor that decides between success and failure.
EDSGER DIJKSTRA Aim for brevity while avoiding jargon.
EDSGER DIJKSTRA The competent programmer is fully aware of the limited size of his own skull. He therefore approache...
EDSGER DIJKSTRA The traditional mathematician recognizes and appreciates mathematical elegance when he sees it. I pr...
EDSGER DIJKSTRA Object-oriented programming is an exceptionally bad idea which could only have originated in Califor...
EDSGER DIJKSTRA The students that, like the wild animal being prepared for its tricks in the circus called 'life...
EDSGER DIJKSTRA Don't blame me for the fact that competent programming, as I view it as an intellectual possibility,...
EDSGER DIJKSTRA If debugging is the process of removing software bugs, then programming must be the process of putti...
EDSGER DIJKSTRA Progress is possible only if we train ourselves to think about programs without thinking of them as ...
EDSGER DIJKSTRA If in physics there's something you don't understand, you can always hide behind the uncharted depth...
EDSGER DIJKSTRA The effort of using machines to mimic the human mind has always struck me as rather silly. I would r...
EDSGER DIJKSTRA The problem with privacy cases is that most privacy plaintiffs have to give up their privacy. In ord...
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More Edsger Dijkstra

Simplicity is prerequisite for reliability.
EDSGER DIJKSTRA I mentioned the non-competitive spirit explicitly, because these days, excellence is a fashionable c...
EDSGER DIJKSTRA Teaching to unsuspecting youngsters the effective use of formal methods is one of the joys of life b...
EDSGER DIJKSTRA APL is a mistake, carried through to perfection. It is the language of the future for the programmin...
EDSGER DIJKSTRA Many mathematicians derive part of their self-esteem by feeling themselves the proud heirs of a long...
EDSGER DIJKSTRA The lurking suspicion that something could be simplified is the world's richest source of reward...
EDSGER DIJKSTRA The use of COBOL cripples the mind; its teaching should, therefore, be regarded as a criminal offens...
EDSGER DIJKSTRA The ability of discerning high quality unavoidably implies the ability of identifying shortcomings.
EDSGER DIJKSTRA Perfecting oneself is as much unlearning as it is learning.
EDSGER DIJKSTRA Programming is one of the most difficult branches of applied mathematics; the poorer mathematicians ...
EDSGER DIJKSTRA About the use of language: it is impossible to sharpen a pencil with a blunt axe. It is equally vain...
EDSGER DIJKSTRA The question of whether a computer can think is no more interesting than the question of whether a s...
EDSGER DIJKSTRA Don't compete with me: firstly, I have more experience, and secondly, I have chosen the weapons.
EDSGER DIJKSTRA If 10 years from now, when you are doing something quick and dirty, you suddenly visualize that I am...
EDSGER DIJKSTRA Why has elegance found so little following? That is the reality of it. Elegance has the disadvantage...
EDSGER DIJKSTRA Mathematicians are like managers - they want improvement without change.
EDSGER DIJKSTRA It is practically impossible to teach good programming to students that have had a prior exposure to...
EDSGER DIJKSTRA There should be no such thing as boring mathematics.
EDSGER DIJKSTRA Computer science is no more about computers than astronomy is about telescopes.
EDSGER DIJKSTRA Elegance is not a dispensable luxury but a factor that decides between success and failure.
EDSGER DIJKSTRA Aim for brevity while avoiding jargon.
EDSGER DIJKSTRA The competent programmer is fully aware of the limited size of his own skull. He therefore approache...
EDSGER DIJKSTRA The traditional mathematician recognizes and appreciates mathematical elegance when he sees it. I pr...
EDSGER DIJKSTRA Object-oriented programming is an exceptionally bad idea which could only have originated in Califor...
EDSGER DIJKSTRA The students that, like the wild animal being prepared for its tricks in the circus called 'life...
EDSGER DIJKSTRA Don't blame me for the fact that competent programming, as I view it as an intellectual possibility,...
EDSGER DIJKSTRA If debugging is the process of removing software bugs, then programming must be the process of putti...
EDSGER DIJKSTRA Progress is possible only if we train ourselves to think about programs without thinking of them as ...
EDSGER DIJKSTRA If in physics there's something you don't understand, you can always hide behind the uncharted depth...
EDSGER DIJKSTRA The effort of using machines to mimic the human mind has always struck me as rather silly. I would r...
EDSGER DIJKSTRA Computer Science is no more about computers than astronomy is about telescopes
EDSGER W. DIJKSTRA The question of whether a computer can think is no more interesting than the question of whether a s...
EDSGER W. DIJKSTRA Raise your quality standards as high as you can live with, avoid wasting your time on routine proble...
EDSGER W. DIJKSTRA Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it....
EDSGER W. DIJKSTRA Simplicity is prerequisite for reliability.
EDSGER W. DIJKSTRA The use of COBOL cripples the mind; its teaching should, therefore, be regarded as a criminal offens...
EDSGER W. DIJKSTRA The question of whether a computer can think is no more interesting than the question of whether a s...
E. W. DIJKSTRA Computer Science is no more about computers than astronomy is about telescopes.
E. W. DIJKSTRA Computer Science is no more about computers than astronomy is about telescopes.
EDSGAR W. DIJKSTRA About the use of language: it is impossible to sharpen a pencil with a blunt axe. It is equally vain...
EDSGAR W. DIJKSTRA FORTRAN --'the infantile disorder'--, by now nearly 20 years old, is hopelessly inadequate for whate...
EDSGAR W. DIJKSTRA The tools we use have a profound (and devious!) influence on our thinking habits, and, therefore, on...
EDSGAR W. DIJKSTRA The fathers of the field had been pretty confusing: John von Neumann speculated about computers and ...
E. W. DIJKSTRA The use of COBOL cripples the mind; its teaching should, therefore, be reguarded as a criminal offen...
E. W. DIJKSTRA It is practically impossible to teach good programming style to students that have had prior exposur...
E. W. DIJKSTRA