Can your brain create fake memories?

Yes. Your brain can create fake or altered memories, and it does this more often than people realize.

Memory is reconstructive, not a perfect recording. Each time you recall an event, your brain rebuilds it and can fill in gaps with details that feel real.

Common ways this happens:

• Misinformation effect: later suggestions or misleading info get mixed into the memory.
• Source confusion: you remember something correctly but misremember where it came from, like a dream, movie, or story.
• Gist over details: the main idea stays, but missing specifics get invented.
• Expectation bias: your brain inserts what “should” have been there based on experience.

So yes—fake memories are a normal brain feature, not just something rare.