Memories seem unchanging and solid. Moreover, they help make us who we are. Many people consider themselves to be the sum of their memories. And yet, strong evidence exists that suggests our memories are highly complex, malleable, and extremely falliable. Through effective suggestion, we can be made to remember things that never happened, or in less extreme cases, change the details of things that really did happen. How much of what you remember is real, and how much is illusion?