Related:

• If for every rule there is an exception, then we have established that there is an exception to every rule.
  If we accept "For every rule there is an exception" as a rule, then we must concede that there may not be an exception after all, since the rule states that there is always the possibility of exception, and if we follow it to its logical end we must agree that there can be an exception to the rule that for every rule there is an exception....
• If for every rule there is an exception, then we have established that there is an exception to every rule.
  If we accept "For every rule there is an exception" as a rule, then we must conced that there may not be an exception after all, since the rule states that there is always the possibility of exception, and if we follow it to its logical end we must agree that there can be an exception to the rule that for every rule there is an exception....
• There is no useful rule without an exception. -- Thomas Fulle
• There is an exception to every rule, except this one.
• To every rule there is an exception, and vice versa.
• There is an exception to all exceptions.
• You can only govern men by serving them. The rule is without exception. -- Victor Cousi
• There is an exception to all laws. -- Government's Law