Memory researchers have studied the “doorway effect”: when people move between rooms, they can sometimes find it harder to recall what they were holding in mind before the transition. One hypothesis links this to a boundary between events. As you walk, the setting changes, your attention shifts, and the previous intention becomes harder to retrieve.
But a doorway does not erase a thought. In later experiments, the effect did not always appear. The task conditions, the load on memory, and how much a person is holding in mind at once all matter. So “the doorway did it” is too convenient an explanation for every case: sometimes you were simply distracted by a notification, a conversation, or a new task.
If a thought slips away, it is more useful to retrace the sequence than to get annoyed with yourself. Where were you a minute ago? What were you holding? What were you about to finish? Sometimes one clue is enough: “I came in for the charger because the battery was almost dead.” Sometimes nothing important comes back—and that is not a catastrophe either. Forgetting one trip to the kitchen says nothing about your memory as a whole.
The stars speak. The choice is yours.