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"Program testing can be used to show the presence of bugs, but never to show their absence!"
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"I came from the country, and when I came to the city, I was ridin' high, you know. I was seeing more lights than I ever dreamed to shine in the world. 'Cos where I came from, there wasn't too many lights. Bugs made a lot of light, but after that there wasn't no lights."

"I was lucky enough to get to see guys like Bugs Henderson, Jimmy Wallace, all those great Texas blues players."
Bugs,

"Richard doesn't really like me to kill bugs, but sometimes I can't help it."

"It's a beautiful tale, and today is a beautiful day without any bugs."

"Most of the results of using technical bugging devices were of little importance for my service. It may have been different in counter-intelligence, where bugs in flats, etc., were used to obtain a lot of information about what counter-intelligence was interested in."

"My reply is: the software has no known bugs, therefore it has not been updated."
Explore more quotes by Edsger Dijkstra

"Elegance is not a dispensable luxury but a factor that decides between success and failure."

"Don't compete with me: firstly, I have more experience, and secondly, I have chosen the weapons."

"If 10 years from now, when you are doing something quick and dirty, you suddenly visualize that I am looking over your shoulders and say to yourself: 'Dijkstra would not have liked this', well that would be enough immortality for me."

"It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration."

"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."

"I mentioned the non-competitive spirit explicitly, because these days, excellence is a fashionable concept. But excellence is a competitive notion, and that is not what we are heading for: we are heading for perfection."

"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."

"The students that, like the wild animal being prepared for its tricks in the circus called "life", expects only training as sketched above, will be severely disappointed: by his standards he will learn next to nothing."
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