Suddenly... Your idea of someone is shifted...irreparably, so it seems. At first. At the least. Maybe over time you'll forget, somewhat. That is to say, whatever disappearing moment may transition into a partial, fickle memory. You will recall it, inconveniently, possibly with slight inconsistency, and they will claim, should you choose to mention it, some sort of factual discrepancy. It may well hover, all the way to the end of your personal eternity, and it may go unnoticed, covered by each new epiphany, layering in thin, single coats to be reminiscently noticed as a shadow. No matter how deep into someone's secrets you may go, There is always more to know.