I'm not sure that's always true. Imagine a WW II era politician in London who gets elected on the promimse of building a new University. Right after the elec

I'm not sure that's always true. Imagine a WW II era politician in London who gets elected on the promimse of building a new University. Right after the election Germany declares war and starts bombing London. Under those circumstances is it still wrong for him to go back on his promise of building a University? You have to judge people by the circumstances they're handed and sometimes that means giving them a pass on certain promises