Gumperson's Law:

Gumperson's Law: The probability of anything happening is inversely
proportional to its desirability.

Related:

• The probability of anything happening is inversely proportional to its desirability.
  Gumperson's...
• Gumperson's Law:
  The probability of a given event occurring is inversely...
• Gumperson's Law The probability of anything happening
  is in inverse ratio to its desirability...
• The probability of anything happening is in inverse ratio to its desirability.
  John W. Hazard, "Changing Times"...
• McGoon's Law The probability of winning is inversely
  proportional to the amount of the wager...
• The probability of an event's occurring varies directly with the perversity of the inanimate object involved and inversely with product of its desirability and the effort expended to produce it.
  Walter...
• The vehemence with which an issue is debated is inversely proportional to its importance.
  Parkinson's Law -- Bill...
• The usefulness of a meeting is inversely proportional
  to its attendance...
• The legibility of a copy is inversely proportional
  to its importance...