When you do the same thing over and over again but don't expect a different result, it is commonly referred to as "insanity" or "the definition of insanity." This phrase is often attributed to Albert Einstein, although there is no concrete evidence that he actually said it. Nonetheless, it has become a widely used saying to describe situations where someone repeatedly tries the same approach, method, or action while hoping for a different outcome, despite the evidence suggesting otherwise. It highlights the futility of persisting with an ineffective or flawed strategy.