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A comment on The most dangerous code in the world. Parent comment

Re:The most dangerous code in the world by rolux on Wednesday October 24, 2012 @09:01PM (#4695854)
No, I was actually trying to be specific. There's usually nothing wrong with 0/1 or 1-9.

Empirically, 0/1/2 either means no/yes/yes-and-something-obscure-on-top-of-that, or, worse, as in this case, no/kind-of-but-not-really/yes.

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Re:The most dangerous code in the world by prodigal_erik on Wednesday October 24, 2012 @11:46PM (#4696280)
It's akin to http://c2.com/cgi/wiki?ZeroOneInfinityRule. If you started out thinking it was just a switch, you should be very reluctant to add a third state without rethinking what you really need to express, or you end up with my favorite from TheDailyWTF:

  enum Bool { 
      True,
      False,
      FileNotFound
  };
This would have been much safer as separate AUTHENTICATE_CERT (which checks the CA sig and expiry and revocation) and VERIFY_CERT_COMMON_NAME options, both of which default to true.
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