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Beware of bugs in the above code; I have only proved it…

“Beware of bugs in the above code; I have only proved it correct, not tried it.” quote by Donald Knuth
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“Beware of bugs in the above code; I have only proved it correct, not tried it.”

Donald Knuth

About This Quote

This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.

A programmer’s confidence in code can be misplaced without testing; proof alone isn’t sufficient.

In simple terms: Proof isn’t enough without testing.

Key Takeaway

Always test your code.

Themes

software development rigor validation

Mood

cautious analytical

Type

technical educational

When to use this quote

  • critical systems
  • software releases
  • debugging

Key Concepts

formal verification software testing

Questions to Reflect On

  • What methods ensure code reliability?
  • When is formal proof appropriate?
A Different Perspective

Testing can be costly and time‑consuming.

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