Related:

• If you perceive that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way will promptly develop.
• Murphy's Sixth Law If you perceive that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way, unprepared for, will promptly develop.
• If you perceive that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way will promptly develop.
  -- Murphy's Law Corollary 4...
• If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong.
  If you perceive that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way will promptly develop....
• If there are two possible ways to spell a person's name, you will pick the wrong one.
  -- Second Law of Business Meetings If there is only one way to spell a name, you will spell it wrong, anyway....
• Second Law of Business Meetings: If there are two possible ways to spell a person's name, you will pick the wrong one.
  Corollary: If there is only one way to spell a name, you will spell it wrong, anyway....