Memory is not a video tape recorder. With time our memories change, and many things that we think we remember clearly, we probably don’t; most of us just don’t have 10 year old videos or detailed logs floating around to prove us wrong.

There are many studies that show how easy it is to manipulate memories and how fallible our memories are.

We also tend to personalize stories that we’ve seen others do:
pss.sagepub.com

The shocking thing is that we as a society continue believing that memory is reliable and placing a high value on eye witness testimony and personal anecdotes.