Related:

• The most valuable quotation will be the one for which you cannot determine the source.
  -- Duggan's Law of Scholarly Research The source for an unattributed quotation will appear in the most hostile review of your work....
• You cannot determine beforehand which side of the bread to butter.
  -- The Law of the Perversity of Nature...
• Crittendon's 14th application of Murphy's First Law
  You cannot successfully determine beforehand which side of the bread to butter....
• Law of the Perversity of Nature: You cannot successfully determine beforehand which side of the bread to butter.
• Law of the Perversity of Nature (Mrs. Murphy's Corollary) You cannot successfully determine beforehand which side of the bread to butter.
• The Law of the Perversity of Nature: You cannot determine beforehand which side of the bread to butter.
• You cannot successfully determine beforehand which side of the bread to butter.
  Perversity of Nature Law...