Related:

• Exceptions always outnumber rules.
• The advance of science can be measured by the rate at which exceptions to previously held laws accumulate.
  Corollaries: 1. Exceptions always outnumber rules....
• All rules have exceptions-except the ones that don't.
• People tend to make rules for others and exceptions for themselves.
• The young know the rules, the old know the exceptions.
• A leap year is never a good sheep year.
• One of the first and foremost rules of piracy REAL PIRATES ARE OVER 15 YEARS OLD!
  Exceptions to this rule are extremely rare at best....
• The executive exists to make sensible exceptions to general rules. -- Elting E. Moriso