That definition of insantiy is worthless. Consider this:
You push the button once. Nothing happens. You push it again. Nothing happens. Does that mean nothing will happen in the future? No; that all depends upon what's going on when you push the button. Perhaps nothing that _you can observe_ happens.
FWIW, 'insanity' has many different definitions depending upon what kind of insanity you're talking about. There are different types of psychoses, schizophrenia, and sociopathic behavior as well.
You push the button once. Nothing happens. You push it again. Nothing happens. Does that mean nothing will happen in the future? No; that all depends upon what's going on when you push the button. Perhaps nothing that _you can observe_ happens.
FWIW, 'insanity' has many different definitions depending upon what kind of insanity you're talking about. There are different types of psychoses, schizophrenia, and sociopathic behavior as well.