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Edsger Dijkstra Quotes

Testing shows the presence, not the absence of bugs Picture Quote #1

Beauty is our business Picture Quote #1

Thank goodness we don’t have only serious problems, but ridiculous ones as well Picture Quote #1

There should be no such thing as boring mathematics Picture Quote #1

The ability of discerning high quality unavoidably implies the ability of identifying shortcomings Picture Quote #1

Perfecting oneself is as much unlearning as it is learning Picture Quote #1

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Elegance is not a dispensable luxury but a factor that decides between success and failure Picture Quote #1

Several people have told me that my inability to suffer fools gladly is one of my main weaknesses Picture Quote #1

The question of whether a computer can think is no more interesting than the question of whether a submarine can swim Picture Quote #1

Raise your quality standards as high as you can live with, avoid wasting your time on routine problems, and always try to work as closely as possible at the boundary of your abilities. Do this, because it is the only way of discovering how that boundary should be moved forward Picture Quote #1

The question of whether computers can think is like the question of whether submarines can swim Picture Quote #1

About the use of language: it is impossible to sharpen a pencil with a blunt axe. It is equally vain to try to do it with ten blunt axes instead Picture Quote #1

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Besides a mathematical inclination, an exceptionally good mastery of one’s native tongue is the most vital asset of a competent programmer Picture Quote #1

If you want more effective programmers, you will discover that they should not waste their time debugging, they should not introduce the bugs to start with Picture Quote #1

We must be very careful when we give advice to younger people: sometimes they follow it! Picture Quote #1

Program testing can be used to show the presence of bugs, but never to show their absence! Picture Quote #1

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise Picture Quote #1

Why has elegance found so little following? That is the reality of it. Elegance has the disadvantage, if that’s what it is, that hard work is needed to achieve it and a good education to appreciate it Picture Quote #1

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The traditional mathematician recognizes and appreciates mathematical elegance when he sees it. I propose to go one step further, and to consider elegance an essential ingredient of mathematics: if it is clumsy, it is not mathematics Picture Quote #1

The competent programmer is fully aware of the limited size of his own skull. He therefore approaches his task with full humility, and avoids clever tricks like the plague Picture Quote #1

Don’t compete with me: firstly, I have more experience, and secondly, I have chosen the weapons Picture Quote #1

Teaching to unsuspecting youngsters the effective use of formal methods is one of the joys of life because it is so extremely rewarding Picture Quote #1

Probably I am very naive, but I also think I prefer to remain so, at least for the time being and perhaps for the rest of my life Picture Quote #1

I don’t need to waste my time with a computer just because I am a computer scientist Picture Quote #1

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Don’t blame me for the fact that competent programming, as I view it as an intellectual possibility, will be too difficult for the average programmer, you must not fall into the trap of rejecting a surgical technique because it is beyond the capabilities of the barber in his shop around the corner Picture Quote #1

Are you quite sure that all those bells and whistles, all those wonderful facilities of your so called powerful programming languages, belong to the solution set rather than the problem set? Picture Quote #1

Computer science is no more about computers than astronomy is about telescopes, biology is about microscopes or chemistry is about beakers and test tubes. Science is not about tools. It is about how we use them, and what we find out when we do Picture Quote #1

When building sand castles on the beach, we can ignore the waves but should watch the tide Picture Quote #1

The use of anthropomorphic terminology forces you linguistically to adopt an operational view. And it makes it practically impossible to argue about programs independently of their being executed Picture Quote #1

Industry suffers from the managerial dogma that for the sake of stability and continuity, the company should be independent of the competence of individual employees Picture Quote #1

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Text Quotes

Testing shows the presence, not the absence of bugs (Edsger Dijkstra Quotes) Beauty is our business (Edsger Dijkstra Quotes) Thank goodness we don’t have only serious problems, but ridiculous ones as well (Edsger Dijkstra Quotes) There should be no such thing as boring mathematics (Edsger Dijkstra Quotes) The ability of discerning high quality unavoidably implies the ability of identifying shortcomings (Edsger Dijkstra Quotes) Perfecting oneself is as much unlearning as it is learning (Edsger Dijkstra Quotes) Elegance is not a dispensable luxury but a factor that decides between success and failure (Edsger Dijkstra Quotes) Several people have told me that my inability to suffer fools gladly is one of my main weaknesses (Edsger Dijkstra Quotes) The question of whether a computer can think is no more interesting than the question of whether a submarine can swim (Edsger Dijkstra Quotes) Raise your quality standards as high as you can live with, avoid wasting your time on routine problems, and always try to work as closely as possible at the boundary of your abilities. Do this, because it is the only way of discovering how that boundary should be moved forward (Edsger Dijkstra Quotes) The question of whether computers can think is like the question of whether submarines can swim (Edsger Dijkstra Quotes) About the use of language: it is impossible to sharpen a pencil with a blunt axe. It is equally vain to try to do it with ten blunt axes instead (Edsger Dijkstra Quotes) Besides a mathematical inclination, an exceptionally good mastery of one’s native tongue is the most vital asset of a competent programmer (Edsger Dijkstra Quotes) If you want more effective programmers, you will discover that they should not waste their time debugging, they should not introduce the bugs to start with (Edsger Dijkstra Quotes) We must be very careful when we give advice to younger people: sometimes they follow it! (Edsger Dijkstra Quotes) Program testing can be used to show the presence of bugs, but never to show their absence! (Edsger Dijkstra Quotes) The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise (Edsger Dijkstra Quotes) Why has elegance found so little following? That is the reality of it. Elegance has the disadvantage, if that’s what it is, that hard work is needed to achieve it and a good education to appreciate it (Edsger Dijkstra Quotes) The traditional mathematician recognizes and appreciates mathematical elegance when he sees it. I propose to go one step further, and to consider elegance an essential ingredient of mathematics: if it is clumsy, it is not mathematics (Edsger Dijkstra Quotes) The competent programmer is fully aware of the limited size of his own skull. He therefore approaches his task with full humility, and avoids clever tricks like the plague (Edsger Dijkstra Quotes) Don’t compete with me: firstly, I have more experience, and secondly, I have chosen the weapons (Edsger Dijkstra Quotes) Teaching to unsuspecting youngsters the effective use of formal methods is one of the joys of life because it is so extremely rewarding (Edsger Dijkstra Quotes) Probably I am very naive, but I also think I prefer to remain so, at least for the time being and perhaps for the rest of my life (Edsger Dijkstra Quotes) I don’t need to waste my time with a computer just because I am a computer scientist (Edsger Dijkstra Quotes) Don’t blame me for the fact that competent programming, as I view it as an intellectual possibility, will be too difficult for the average programmer, you must not fall into the trap of rejecting a surgical technique because it is beyond the capabilities of the barber in his shop around the corner (Edsger Dijkstra Quotes) Are you quite sure that all those bells and whistles, all those wonderful facilities of your so called powerful programming languages, belong to the solution set rather than the problem set? (Edsger Dijkstra Quotes) Computer science is no more about computers than astronomy is about telescopes, biology is about microscopes or chemistry is about beakers and test tubes. Science is not about tools. It is about how we use them, and what we find out when we do (Edsger Dijkstra Quotes) When building sand castles on the beach, we can ignore the waves but should watch the tide (Edsger Dijkstra Quotes) The use of anthropomorphic terminology forces you linguistically to adopt an operational view. And it makes it practically impossible to argue about programs independently of their being executed (Edsger Dijkstra Quotes) Industry suffers from the managerial dogma that for the sake of stability and continuity, the company should be independent of the competence of individual employees (Edsger Dijkstra Quotes)

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