Does time really change people?Folks older and, presumably, wiser than myself have claimed as much. This idea sure sounds nice; like the sort of thing one might expect to find on a greeting card from disowned family, the type of sermon which can be anticipated from the pastor who wants to please his flock (donations do not pay themselves, you know), or the kind of shtick a forsaken housewife believes when her unfaithful husband claims that -- this time -- he really has turned a new leaf.Color me unconvinced.I believe that people have a certain personality type, determined mainly by genetic factors, and this is set in stone at a young age. My perspective is not based on sentiment, but the cold, hard facts of cognitive science.Unlike personality, situations may change rapidly.