Consider an experience that we all have on a regular basis: A memory from years ago inexplicably pops into your head. Often this will be a memory of a person or an event that you haven’t thought about for a long time. It is evident that something has triggered the memory. The train of thought that did so may be apparent and something you are able to articulate. At other times you may be aware of the sequence of thoughts that led to the memory but would have a hard time expressing it. Often the trigger is quickly lost, so the memory appears to have come from nowhere. I often experience these
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