The late, great film critic Roger Ebert once noted (and I'm paraphrasing because I can't find the exact quote at the moment) that one of the benefits of relationships is that the other person acts as a sort of mirror to our lives. He was mostly referring to romantic couplings, though I think this can be expanded to encompass parents, friends and other platonic relationships. Indeed, sharing experiences with people helps create a collective memory, or sorts. These shared memories can help us bond, both in the moment and later on down the road, as the memories are recalled, hopefully fondly. What happens, however, when age and time begin to ravage the memory banks of our compatriots? Or, perhaps, ourselves? In reality, memory is often variable, and no two people will have exactly the same recollection of events. And yet, when one of those involved in the same situation begins to have no remembrance of it at all, then that is truly saddening. It is depressing for them, and...