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About this quote

What does it mean?
What is fixed for one person is dynamic for another.
In plain terms
Constants and variables depend on your perspective.
What can you take from it?
Perspective defines what changes.

Where it applies

  • debugging
  • design decisions
  • discussions

Putting it to work

  • redefine fixed ideas
  • check assumptions

Questions to consider

  • What do you treat as constant?
  • Can you shift perspective?

Another view

It glosses over technical definitions of constants.

More from Alan Perlis

  1. LISP programmers know the value of everything and the cost of nothing.

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  2. Simplicity does not precede complexity, but follows it.

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  3. It is easier to write an incorrect program than understand a correct one.

    Permalink to quote #18

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