"memory is normally embedded in an ongoing experience of a person who is remembering...     if the photograph isn't "tricked" in one way or another, it is authentic like a trace of an event: the problem is that an event , when it is isolated from all the others events that come before it and wich go after it, is in another sense not very authentic because it has been seized from that ongoing experience witch is the true authenticity. Photographs are both authentic and not authentic: whether the authentic side of photographs can be used authentically or not depends upon how you use them."
                                                              John Berger