the exception proves the rule

[ndofu]

Why does 'the exception prove the rule'? How can it? It has beeen bugging me for years. Please explain someone. Many thanks

[kempie]

From the legal principle exceptio probat regulam in casibus non exceptis ("the exception confirms the rule in cases not excepted").

In other words, the fact that an exception is stated serves to establish the existence of a rule that applies to cases not covered by the exception.

e.g. a sign that says "parking prohibited on Sundays" (the exception) "proves" that parking is allowed on the other six days of the week (the rule).

http://en.wikipedia.org/wiki/Exception_that_pr oves_the_rule

[ndofu]

Many thanks Kempie. Now it does makes sense! Never thought of trying wikipedia for a saying.

[brionon]

Prove means Test. today most think it means ''Show to be right'. So,'' the Exception Tests the Rule.''

[Jibergrt]

Well I am impressed - I never could understand it either, so thanks for asking it ndofu and thanks for answering it kempie. I will now be able to sound even more of a knowitall if someone ever asks me!