In terms of their change, they resemble the algorithmic; changes happen both discrete (separated) and under discretion (tacit). E.g. "the hotel room, now dorm room, now outside field exposed to rain." It is not clear whether this is an essential property of the dream, or it belongs to the mode of their recall, which is challenged with verbalisation, but there are cases that indicate the essential: "I notice the fundamental error – the room; I must have confused it, it unnoticably changed."
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