There are no rules, only exceptions.
There are no exceptions to a rule or it isn't a rule. That old saying, "The exception proves the rule", uses the word "prove" in the obsolete meaning of "tests"; it really means that a perceived exception tests the validity of a rule and, if the exception is real, then the rule is no longer a rule.
I have never understood the saying
BTW Do you think Big Daddy and Yours Truly are related?
Rules are simply made to try and reinforce principles!
for example "Killing is wrong!" may be a principle that you wish to live with.
With thought and consideration, you may want to build rules that protect that principle.
Almost invariably, for every rule, there is an alternative persperctive or view, hence the exception.
Not as a rule
besides that quote is more of a fact then a rule
The exception is the rule. So no
It depends on what that rule covers.