Related:

• After the 16th screw has been removed, the wrong cover will have been removed.
  -- Klipstein's Eighth Law of Productio...
• After an access cover has been secured by 16 hold-down screws, it will be discovered that the gasket has been omitted.
• After an access cover has been secured by 16 hold-down screws, it will be discovered that the gasket has been omitted.
  de la Lastra's Corollary...
• After assembly of an instrument, extra parts will be found on the workbench.
  -- Klipstein's Tenth Law of Productio...
• A failure will not appear until the unit has passed final inspection.
  -- Klipstein's Sixth Law of Productio...
• A fail-safe circuit will destroy others. -- Klipstein's Fourth Law of Productio
• When an error has been detected and corrected, it will be found to have been correct in the first place.
  -- Scott's second Law After the correction has been found in error, it will be impossible to fit the original quantity back into the equation....
• Scott's second Law: When an error has been detected and corrected, it will be found to have been wrong in the first place.
  Corollary: After the correction has been found in error, it will be impossible to fit the original quantity back into the equation....