> Rules are inflexible Most people aren't this pedantic and implicitly interpret rules as breakable, that's why we have sayings like "rules are meant to be bro

> Rules are inflexible Most people aren't this pedantic and implicitly interpret rules as breakable, that's why we have sayings like "rules are meant to be broken" and "the exception that proves the rule". Generally the enforcement bodies of any set of rules, like courts and police will have a lot of discretion on when and how to apply them. Depending on which definition of principle you want to use the can also be a lot stricter than rules, looking at some definitions online "A basic truth, law, or assumption.", "a fundamental doctrine or tenet; a distinctive ruling opinion", " the laws or facts of nature underlying the working of an artificial device". So substitution principle for rule would make things less clear. Most people are far more cavalier about breaking rules than principles.