False memory
Remembering an event that never happened, or remembering a real event very differently from how it went. False memories can feel as vivid and certain as true ones.
In everyday life
You are annoyed that a friend showed up without the dessert she promised, yet your messages show she never offered to bring anything.
You can describe in rich detail the day you got lost at a shopping mall as a small child, but your parents insist it never happened and nothing else suggests it did.
Why your mind does this
Memory is rebuilt each time we recall it, which lets us update what we know with new information. Revisiting a memory also strengthens it, so the things we return to often become the easiest to reach. This keeps our knowledge current without storing every version of every event.
Its family, in 30 seconds: Edited memories
How to spot it
Notice when a memory is vivid and certain yet no person or record backs it up.
How to counter it
Check important memories against photos, messages, calendars or other people before acting on them.