When two people produce entirely different memories of the same event, observers usually assume that one of them is lying. Of course, some people do invent or embellish stories to manipulate or deceive their audiences (or sell books). But most of us, most of the time, are neither telling the whole truth nor intentionally deceiving. We aren’t lying; we are self-justifying. All of us, as we tell our stories, add details and omit inconvenient facts; we give the tale a small, self-enhancing spin. That spin goes over so well that the next time we add a slightly more dramatic embellishment; we
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