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If you can’t program it, you haven’t understood it.
David Deutsch
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Interpretation

What this quote means

True understanding of a concept is proven by one's ability to implement it practically.

David Deutsch's quote emphasizes that comprehension of an idea is not merely theoretical but practical as well. If one cannot translate a concept into a program, it signifies a lack of deep understanding of that concept, as real mastery enables one to apply knowledge effectively in real-world scenarios, particularly in the field of technology and programming.

Themes

UnderstandingProgrammingKnowledgeImplementationTechnology

In practice

Example use cases

In a tech seminar, to emphasize the importance of hands-on experience, one might say, 'Remember, if you can’t program it, you haven’t understood it.'

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To me quantum computation is a new and deeper and better way to understand the laws of physics, and hence understanding physical reality as a whole.
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Where we have good, testable explanations, they then have to be tested, and we drop the ones that fail the tests.
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