  question: let's say someone does something unintentionally and pisses you off. example: you were supposed to go out to dinner on wednesday night - it is the sunday before that wednesday when your dining companion tells you that he forgot and he already agreed to work late that night and he won't be home until 10pm. he apologizes profusely and tries to switch days with someone but is unable to do so. how mad should you get at the person for forgetting his schedule and ruining your plans? 
