I’ll use the mpeg analogy. When you open a memory, you are opening what YOU wrote to YOUR memory. It passes through filters like self image, world view, personal values and so forth before being written. Furthermore, it’s compressed. So what you’re opening is already highly processed. When you close the memory, you write it again, AFTER passing it through the same or even different filters and compress it again. Just like an mpeg video, it loses accuracy each time it is saved back. This isn’t to say you should never trust your memory or even someone else’s. I’m saying that a memory isn’t the occurrence or event. It’s a representation of it that loses accuracy over time. Actually I find the whole thing kind of fun on a personal level, but in court I’ll trust the camera over the eye witness every time.