Douwe Draaisma shows how memories show no more than a single version of reality, and are thus only half-truths. This, according to Draaisma, is because our memories are influenced and formed by our later experiences. Hence the motto of his latest book: ‘Something which happened to you in childhood is often the consequence of an incident in later years.’

How does your memory serve when you are told later in life that your biological father is not the one who brought you up? What happens when you discover that you’ve been deceived by your loved one, and you realize that the deceit has been going on for some time? How are your recollections of a friend or loved one affected if you later find out that they’ve committed some dreadful crime?

Some experiences are so intense that not only do they affect your future, but your past, too. What you only learn at a later age can, from one moment to the next, change the shape of your life story, like a cushion being pressed, leaving behind another shape. So how far can we rely on our memory? How important anyway is that trust? Can memories contradict one another at different times in our lives, and yet both be true? How does another’s personal history affect your own identity, one which is largely formed through memory?

Draaisma poses these sorts of questions, relevant to us all, and produces surprising interpretations as well as a thorough analysis of the workings of the memory, giving us insight into how we constantly revise our pasts.