Related:

• Even if the propeller had the power of propelling a vessel
  it would be found altogether useless in practice, because the power being applied in the stern would be absolutely impossible to make the vessel steer....
• Patry's Law: If you know something can go wrong, and take due precaution to prevent it, something else will go wrong.
• Teamwork is vital! (It gives you someone to blame.)
• If a program is useless, it will have to be documented.
• A useless life is an early death.
• I'm a mine of useless information....
• It is useless to resist. -- A Sensorite, The Sensorite
• Resistance is useless: Milly Ohm
• There must be a demand for useless software.