The Definition of Insanity

The ignorant cliche that 'Doing the same thing over and over again and expecting a different result is the definition of insanity' has become very common. It is also wrong. 

There is a very long and detailed reference manual with a great many definitions of insanity. The manual is so comprehensive that it aims to list them all. The above is not one of them. 

Doing the same thing over and over again and expecting a different result is the definition of STUPIDITY. 

Another example of stupidity: Repeating tired and inaccurate cliches that you saw on Facetagram and Twit. Please stop. Do it for the children.