Related:

• To every rule there is an exception, and vice versa.
• There is an exception to every rule, except this one.
• 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....
• Punning is the worst vice, and there's no vice versa.
• It's the president, stupid! (And vice versa.)
• A good general rule is to state that the bouquet is better than the taste, and vice versa.
  -- Stephen Potte...
• I snatch kisses. (and vice versa)
• Vice versa - poems about brothels?