Research has linked the ability to visualize to a bewildering variety of human traits--how we experience trauma, hold grudges, and, above all, remember our lives.
The writer took on the trial of Lord Haw-Haw, a British Fascist who became a mouthpiece for the Nazis, and who prefigured the reactionary toadyism of our own era.
He realizes that she has known, maybe for a while, that at some point this would come up--this question, and then, right behind it, the obvious answer.