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I noticed that you used the word "agile" in On Lisp, which can hardly have been a word to be expected in a book about hacking. By the time I read it, though, the agile software movement existed, so it leapt out at me.

"Refactoring" is a particularly strange word. It's as if people were talking about "exhaling" as a distinct and even controversial practice. How can anyone breathe without exhaling? Yet articles and books would be written about it: "Should Breathers Exhale?" "When Is An Appropriate Time To Exhale?" "Exhaling: For And Against". People would ask their managers for approval to exhale and the managers would say no we can't afford it, and eventually they'd either just do it anyway on the sly or else turn blue and keel over.

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