Muphry’s Law is the editorial application of the better-known Murphy’s Law.

According to John Bangsund, in Society of Editors Newsletter, Muphry’s Law dictates that:

• if you write anything criticizing editing or proofreading, there will be a fault of some kind in what you have written;
• if an author thanks you in a book for your editing or proofreading, there will be mistakes in the book;
• the stronger the sentiment expressed in (a) and (b), the greater the fault;
• any book devoted to editing or style will be internally inconsistent.

• #Adage