The adage should be "the definition of obstinacy is doing the same thing over and over again, expecting different results". However, some obtusely obstinate peo

The adage should be "the definition of obstinacy is doing the same thing over and over again, expecting different results". However, some obtusely obstinate people keep hanging on to it being "the definition of insanity ...". Moreover, they persist in misattributing it to Einstein.