"e;The Doorway Effect - Why walking into a room makes you delete your memory"e; explains a universal human experience: You walk into the kitchen to get something, pass through the door, and suddenly have no idea why you are there. This is not early-onset dementia; it is a feature of how the human brain organizes memories. Author Emily Moss describes the "e;Event Horizon"e; theory. The brain treats different rooms as different "e;files."e; When you walk through a doorway, the brain performs a "e;context reset"e; to free up processing power for the new environment, effectively dumping the short-term memory from the previous room. "e;The Doorway Effect"e; offers comfort and strategies. It teaches readers to carry physical cues (like holding the empty cup) to bridge the context gap. It is a fascinating look at the spatial nature of thought and why our minds are mapped to our physical surroundings.