Insanity is doing the same thing over and over again and expecting different results. In November 1981 a pamphlet from Narcotics Anonymous contained a close match as noted previously:
Snopes.com: Did Einstein say, 'Insanity is doing the same thing over and over again and expecting different results'?
For many years, online users shared an alleged quote from physicist Albert Einstein, claiming he once said, "Insanity is doing the same thing over and over again and expecting different results." The ...
Did Einstein say, 'Insanity is doing the same thing over and over again and expecting different results'?
San Gabriel Valley Tribune: Insanity is repeating the same mistakes and expecting different results. Just say No to Measure A.
Albert Einstein never said, “insanity is repeating the same mistakes and expecting different results.” That oft-misattributed quote came from a 1980s Narcotics Anonymous pamphlet. Ironically, it thus ...
Insanity is repeating the same mistakes and expecting different results. Just say No to Measure A.
Quote Origin: Insanity Is Doing the Same Thing Over and Over Again and ...
To appreciate what insanity actually is, it's important to grasp what it isn't. Contrary to popular belief, insanity isn't defined as doing the same thing over and over and expecting a different result. And, while it is often used to describe certain states of mind, insanity is also not a medical condition. You won't find a diagnosis for insanity in the "Diagnostic and Statistical Manual of ...
Conceptually, mental insanity also is associated with the biological phenomenon of contagion (that mental illness is infectious) as in the case of copycat suicides. In contemporary usage, the term insanity is an informal, un-scientific term denoting "mental instability"; thus, the term insanity defense is the legal definition of mental instability.