Related:

• Never ask a question unless the answer makes a difference.
• Never jump on a man unless he is down, and when you do, make sure that you confuse him by supplying him with so many facts that he can not possibly understand what you are saying.
• Never ask a question unless the answer makes a difference. -- Anon.
• Never, ever lie to someone you love unless you're absolutely sure they'll never find out the truth.
• Never test for an error condition you don't know how to handle.
• Never test for an error condition you don't know how to handle. -- Steinbach
• Never ask a question of a witness if you don't already know the answer. -- Old Adage
• Although it is said that the athlete was never fatally ill previously, the morning in question he sure woke up dead.
  And being that way, he didn't go nowhere. A person in that condition ain't prone to move around a lot unless he ain't got what he thought he did....
• Steinbach's Guideline for Systems Programming: Never test for an error condition you don't know how to handle.