If you can imagine an AI system that records some approximate representation of its own thinking, and can play that back, and can record its thinking during the

If you can imagine an AI system that records some approximate representation of its own thinking, and can play that back, and can record its thinking during the playback, and play that back, and then 2-ish times more at decreasing fidelity, you've got one. That's it. In actual humans most of the processing is done during the remembering, and remembering is a destructive process, so the brain is pretty good at papering over various issues and maintaining appearances.