Many people change their wills on their own every few years, in response to significant changes in their personal or financial circumstances  This practice can create a problem for the executor when these people are careless and do not date their wills: the executor will then often know neither which one of several undated wills is the most recent, nor whether the will drawn up last has ever been found
Ttherefore, people should not only date their wills but also state in any new will which will it supersedes, for then there would not be a problem to begin with
treats a partial solution to the stated problem as though it were a complete solution