Progress is possible only if we train ourselves to think about programs without thinking of them as pieces of executable code.
Edsger DijkstraRead
Computer science is no more about computers than astronomy is about telescopes.
Interpretation
Computer science focuses on the principles behind computing rather than just the machines used.
Edsger Dijkstra's quote emphasizes that computer science is fundamentally about the theory and concepts that underpin computing, much like astronomy is about understanding celestial phenomena rather than solely the tools used to observe them. This highlights the importance of theoretical knowledge in any discipline and urges us to see the bigger picture beyond the physical tools at our disposal.
In practice
In a computer science class, a teacher might use this quote to inspire students to focus on concepts rather than just programming languages.
Progress is possible only if we train ourselves to think about programs without thinking of them as pieces of executable code.
Simplicity is prerequisite for reliability.
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
We shall do a much better programming job, provided that we approach the task with a full appreciation of its tremendous difficulty, provided that we stick to modest and elegant programming languages, provided that we respect the intrinsic limitations of the human mind and approach the task as Very Humble Programmers.
The tools we use have a profound and devious influence on our thinking habits, and therefore on our thinking abilities.
LISP has jokingly been described as "the most intelligent way to misuse a computer." I think that description is a great compliment because it transmits the full flavour of liberation: it has assisted a number of our most gifted fellow humans in thinking previously impossible thoughts.
The God of the Bible is also the God of the genome. He can be worshipped in the cathedral or in the laboratory. His creation is majestic, awesome, intricate, and beautiful.
If we had the fundamental laws of nature tomorrow, we still wouldn't understand consciousness. We wouldn't even understand turbulence.
Mathematics as an expression of the human mind reflects the active will, the contemplative reason, and the desire for aesthetic perfection. Its basic elements are logic and intuition, analysis and construction, generality and individuality. Though different traditions may emphasize different aspects, it is only the interplay of these antithetic forces and the struggle for their synthesis that constitute the life, usefulness, and supreme value of mathematical science.
This preservation of favourable variations and the destruction of injurious variations, I call Natural Selection, or the Survival of the Fittest. Variations neither useful nor injurious would not be affected by natural selection and would be left a fluctuating element.
By 2040, the Sahara will be moving into Europe and Berlin will be as hot as Baghdad. Atlanta will end up a kudzu jungle. Phoenix will become uninhabitable, as will parts of Beijing (desert), Miami (rising seas) and London (floods). Food shortages will drive millions of people north, raising political tensions.
Venus has a runaway greenhouse effect. I kind of want to know what happened there because we're twirling knobs here on Earth without knowing the consequences of it. Mars once had running water. It's bone dry today. Something bad happened there as well.
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