After we talk about something that happened, this slimmer version of the memory is saved, and so we lose the fuller, original memory. Then, the next time we talk about this memory, maybe we leave out a detail. You don’t mention that it had been raining. When we go to retell what happened a third time, the rain is gone from the memory. So as soon as an episodic memory leaves my lips, it contains less information than the original memory had.
