Claudia Hammond said this quote

In fact the flexibility of our memories makes it relatively easy because we can meld all these different memories together seamlessly to invent a new imaginary scene, one which we have never even contemplated before, let alone witnessed. The flexibility of memory seems to be the key to imagining a future. Our millions of fragments of memories from different times of our lives are not set in stone; they can change, giving us endless, instant imaginative possibilities.