Think back to a recent memorable event in your life: perhaps attending the opening session of a conference or meeting a friend you haven’t seen in a while for a drink. Try to picture the scene as clearly as possible. Most people in this scenario can conjure a surprisingly vivid recollection of the event—even though you made no special effort to remember it at the time. If you systematically counted the unique details in this memory, the total number of items would likely be surprisingly numerous. Your mind, in other words, can quickly retain lots of detailed information—if it’s stored in the
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